{"title":"Barlows \u0026 Focal Extenders","description":"\u003cp\u003eBarlow lenses and focal extenders for visual use. Part of \u003ca href=\"\/collections\/eyepieces\"\u003eEyepieces\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"1-25-2x-barlow-full-multicoated","title":"1.25\" 2X Barlow full Multicoated","description":"\u003cspan style=\"background-color: rgb(255, 255, 255); font-family: Arial;\"\u003eThese high performance Barlows feature 27mm elements and fullly-muliticoated achromatic design. Available in both 2x and 3x, these short designs will work in diagonals, have internal darkening and edge-blackened lenses, and are parfocal with most eyepieces. Suitable for high contrast, high power applications in any telescope.\u003c\/span\u003e\u003cdiv\u003e    \u003c\/div\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":44012347490415,"sku":"UB2S","price":54.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/barlow2__45453.jpg?v=1766547726"},{"product_id":"antares-2-1-6x-barlow-twist-lock","title":"Antares 2\" 1.6x Barlow Twist lock","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial, sans-serif; font-weight: bold;\"\u003eThe 2\" 1.6X barlow\u003c\/span\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003e is back after a complete optical and mechanical re-design.  \u003cspan style=\"font-weight: bold;\"\u003eIt comes in (2) parts.  \u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"font-size: 8pt; font-family: Arial, sans-serif;\"\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 8pt; font-family: Arial, sans-serif;\"\u003e \u003c\/span\u003e\u003cspan style=\"font-family: Arial, sans-serif; font-weight: bold;\"\u003ePart#1\u003c\/span\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003e is like a DP2, housing the lens; 2\" barrel with T2 output thread.  The lens has been optimized for 55mm backfocus, consistent with DSLR's like Canon and Nikon.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 8pt; font-family: Arial, sans-serif;\"\u003e \u003c\/span\u003e\u003cspan style=\"font-family: Arial, sans-serif; font-weight: bold;\"\u003ePart#2\u003c\/span\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003e threads onto the T2 thread of part#1 for visual use, with the usual twist-lock format.  A rubber ring is supplied; it goes between the two parts to prevent un-threading when using the Visual Back.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: 8pt; font-family: Arial, sans-serif;\"\u003e \u003c\/span\u003e\u003cspan style=\"font-family: Arial, sans-serif;\"\u003eThis has been designed to not change the characteristics of the telescope (eg. a Newtonian will still have coma), but edge spot size has been reduced by 30% over the previous version.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":44012358172783,"sku":"2UBSTL","price":118.8,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/2UBSTL-1__08729.jpg?v=1766547816"},{"product_id":"antares-2x-barlow-with-twistlock","title":"Antares 2X Barlow with twistlock","description":"\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eHigh quality barlow lens that features twist lock\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThis barlow lens features a twist lock mechanism which makes your eyepiece\/camera centralized. This makes more of the stars focused so it is far better for astrophotography. Objects that are in the center of the field are more likely to be pin points.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eThis high-performance Antares Barlow features large 26mm-diameter optical elements (great for use with a wide range of eyepieces) and a fully multi-coated achromatic design with edge-blackened lenses for maximum contrast. The 'short' design ensures that it will work with star diagonals. The Barlow is ideal for use with low-powered (long focal length) eyepieces to deliver higher powers, but with maximum eye-relief and viewing comfort. It is also very useful for webcam imaging and other astro-photographic applications. This super-quality Barlow achieves high-powered views with a high standard of colour correction   ideal for planetary and lunar observing.\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Arial;\"\u003eRemove the twist lock and expose male T\/T2 threads to attached a DSLR camera adapter\u003c\/span\u003e\u003c\/p\u003e\u003cp style=\"border: 0px; outline: rgb(0, 0, 0); vertical-align: baseline; margin: 0px; font-family: Helvetica, Arial, sans-serif; font-size: 12px; background: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"border: 0px; outline: rgb(0, 0, 0); vertical-align: baseline; margin: 0px; font-family: Helvetica, Arial, sans-serif; font-size: 12px; background: rgb(255, 255, 255);\"\u003eAll barlows change the focus point of your telescope. This amount depends on the exact combination of your telescope, barlow, eyepiece and other optical accessories.  Please note that you may not be able to reach focus with all eyepieces when using a barlow.\u003c\/p\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":44012606816367,"sku":"UB2STL","price":79.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ub2stl1__78666.jpg?v=1766548116"},{"product_id":"explore-scientific-5x-1-25-field-extender","title":"Explore Scientific 5x 1.25\" Field Extender","description":"\u003ch2 style=\"margin: 0px 0px 2em; font-family: Arial, Helvetica, sans-serif; font-weight: normal; line-height: 20px; color: rgb(34, 34, 34); text-rendering: optimizelegibility; font-size: 14px; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(236, 229, 227); text-transform: uppercase; background-color: rgb(255, 255, 255);\"\u003e\u003cstrong\u003e5X FOCAL EXTENDER; 1.25-INCH O.D. BARREL\u003c\/strong\u003e\u003c\/h2\u003e\u003ch2 style=\"margin: 0px 0px 2em; font-family: Arial, Helvetica, sans-serif; font-weight: normal; line-height: 20px; color: rgb(34, 34, 34); text-rendering: optimizelegibility; font-size: 14px; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(236, 229, 227); text-transform: uppercase; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"font-family: Verdana, Arial, sans-serif; font-size: 13px; line-height: 18px; text-transform: none;\"\u003eA good Focal Extender adds some real versatility to your telescope accessory line-up. First of all, it allows you to increase the magnification of any eyepiece with the same barrel size that you already own. In other words, 3 eyepieces offer 6 magnification choices with the addition of a focal extender. Secondly, most of the time, lower magnification eyepieces have better eye relief than higher power models. When using a focal extender to increase your magnification, you get to enjoy the generous eye relief of the lower power eyepiece, and that's quite a bonus, especially for eyeglass wearers or for those with fast telescopes who can really push high magnification eyepieces. Remember, we make focal extenders in 2X, 3X and 5x models, so there is something for every style of telescope.\u003c\/span\u003e\u003c\/h2\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":44013002948719,"sku":"FE05-125","price":179.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/5x_compact__60807.png?v=1766548392"},{"product_id":"antares-3x-barlow-with-twistlock","title":"Antares 3X Barlow with twistlock","description":"\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); font-family: arial, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);\"\u003eHigh quality barlow lens that features twist lock\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); font-family: arial, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);\"\u003eThis barlow lens features a twist lock mechanism which makes your eyepiece\/camera centralized. This makes more of the stars focused so it is far better for astrophotography. Objects that are in the center of the field are more likely to be pin points.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); font-family: arial, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);\"\u003eThis high-performance Antares Barlow features large 26mm-diameter optical elements (great for use with a wide range of eyepieces) and a fully multi-coated achromatic design with edge-blackened lenses for maximum contrast. The 'short' design ensures that it will work with star diagonals. The Barlow is ideal for use with low-powered (long focal length) eyepieces to deliver higher powers, but with maximum eye-relief and viewing comfort. It is also very useful for webcam imaging and other astro-photographic applications. This super-quality Barlow achieves high-powered views with a high standard of colour correction   ideal for planetary and lunar observing.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); font-family: arial, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);\"\u003eRemove the twist lock and expose male T\/T2 threads to attached a DSLR camera adapter\u003c\/p\u003e\u003cp style=\"border: 0px; outline: rgb(0, 0, 0); vertical-align: baseline; margin: 0px; font-family: Helvetica, Arial, sans-serif; font-size: 12px; background: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"border: 0px; outline: rgb(0, 0, 0); vertical-align: baseline; margin: 0px; font-family: Helvetica, Arial, sans-serif; font-size: 12px; background: rgb(255, 255, 255);\"\u003eAll barlows change the focus point of your telescope. This amount depends on the exact combination of your telescope, barlow, eyepiece and other optical accessories.  Please note that you may not be able to reach focus with all eyepieces when using a barlow.\u003c\/p\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":44013008912495,"sku":"UB3STL","price":71.28,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ub2stl1__00519.jpg?v=1766548419"},{"product_id":"antares-5x-barlow-with-twistlock","title":"Antares 5X Barlow with twistlock","description":"\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); font-family: arial, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);\"\u003eHigh quality barlow lens that features twist lock\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); font-family: arial, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);\"\u003eThis barlow lens features a twist lock mechanism which makes your eyepiece\/camera centralized. This makes more of the stars focused so it is far better for astrophotography. Objects that are in the center of the field are more likely to be pin points.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); font-family: arial, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);\"\u003eThis high-performance Antares Barlow features large 26mm-diameter optical elements (great for use with a wide range of eyepieces) and a fully multi-coated achromatic design with edge-blackened lenses for maximum contrast. The 'short' design ensures that it will work with star diagonals. The Barlow is ideal for use with low-powered (long focal length) eyepieces to deliver higher powers, but with maximum eye-relief and viewing comfort. It is also very useful for webcam imaging and other astro-photographic applications. This super-quality Barlow achieves high-powered views with a high standard of colour correction   ideal for planetary and lunar observing.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); font-family: arial, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);\"\u003eRemove the twist lock and expose male T\/T2 threads to attached a DSLR camera adapter\u003c\/p\u003e\u003cp style=\"border: 0px; outline: rgb(0, 0, 0); vertical-align: baseline; margin: 0px; font-family: Helvetica, Arial, sans-serif; font-size: 12px; background: rgb(255, 255, 255);\"\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp style=\"border: 0px; outline: rgb(0, 0, 0); vertical-align: baseline; margin: 0px; font-family: Helvetica, Arial, sans-serif; font-size: 12px; background: rgb(255, 255, 255);\"\u003eAll barlows change the focus point of your telescope. This amount depends on the exact combination of your telescope, barlow, eyepiece and other optical accessories.  Please note that you may not be able to reach focus with all eyepieces when using a barlow.\u003c\/p\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":44013009993839,"sku":"UB5STL","price":71.28,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/ub2stl1__10874.jpg?v=1766548424"},{"product_id":"antares-1-5x-barlow-with-twistlock","title":"Antares 1.5X Barlow with twistlock","description":"\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); font-family: arial, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);\"\u003eHigh quality barlow lens that features twist lock. Ideal 1.5x for achieving focus on short focal length telescopes. \u003c\/p\u003e\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); font-family: arial, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);\"\u003eThis barlow lens features a twist lock mechanism which makes your eyepiece\/camera centralized. This makes more of the stars focused so it is far better for astrophotography. Objects that are in the center of the field are more likely to be pin points.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: rgb(64, 64, 64); font-family: arial, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);\"\u003eThis high-performance Antares Barlow features large 26mm-diameter optical elements (great for use with a wide range of eyepieces) and a fully multi-coated achromatic design with edge-blackened lenses for maximum contrast. The 'short' design ensures that it will work with star diagonals. The Barlow is ideal for use with low-powered (long focal length) eyepieces to deliver higher powers, but with maximum eye-relief and viewing comfort. It is also very useful for webcam imaging and other astro-photographic applications. This super-quality Barlow achieves high-powered views with a high standard of colour correction   ideal for planetary and lunar observing\u003c\/p\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":44013154467951,"sku":"UB1.5STL","price":71.28,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/15xbarlowtwist__84115.png?v=1766548671"},{"product_id":"x-cel-lx-2x-barlow","title":"X-Cel LX 2x Barlow","description":"\u003ch1\u003e\u003cspan style=\"font-size:22.0pt;mso-bidi-font-size:24.0pt;font-family:\" arial mso-fareast-font-family: new roman\u003eOverview\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/h1\u003e  \u003cul type=\"disc\"\u003e  \u003cli class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:11.0pt;      mso-bidi-font-size:12.0pt;font-family:\" arial new roman\u003eQuality X-Cel LX 2x Barlow doubles the magnification of      any 1.25  eyepiece.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/li\u003e  \u003cli class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:11.0pt;      mso-bidi-font-size:12.0pt;font-family:\" arial new roman\u003e3-element apochromatic, fully multi-coated optics offer      up bright, sharp images.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/li\u003e  \u003cli class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:11.0pt;      mso-bidi-font-size:12.0pt;font-family:\" arial new roman\u003eA rubber grip helps to avoid accidental drops\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/li\u003e  \u003cli class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:11.0pt;      mso-bidi-font-size:12.0pt;font-family:\" arial new roman\u003eBarrel is threaded to accept standard 1.25  filters.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/li\u003e  \u003cli class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:11.0pt;      mso-bidi-font-size:12.0pt;font-family:\" arial new roman\u003eA brass compression ring holds the eyepiece firmly in      place.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/li\u003e \u003c\/ul\u003e  \u003ch1\u003e\u003cspan style=\"font-size:22.0pt;mso-bidi-font-size:24.0pt;font-family:\" arial mso-fareast-font-family: new roman\u003eDescription\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/h1\u003e  \u003cp class=\"body\"\u003e\u003cspan style=\"font-size:11.0pt;mso-bidi-font-size:12.0pt; font-family:\" arial\u003eWhen inserted between the eyepiece and telescope, this X-Cel 2X Barlow lens doubles the magnification of all your 1.25  eyepieces. The premium apochromatic optics yield high contrast, sharp images, virtually free of false color. \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e  \u003cp class=\"body\"\u003e\u003cspan style=\"font-size:11.0pt;mso-bidi-font-size:12.0pt; font-family:\" arial\u003eThe black anodized housing with orange highlights matches the eyepieces in the Celestron X-Cel LX line. A centralized rubber grip helps to keep your hands securely on the barrel, even when your fingers are cold or you are wearing gloves. A brass compression ring just inside the top of the X-Cel Barlow grabs your eyepiece gently but firmly when you turn the thumbscrew. Once the thumbscrew has been secured in place, the brass ring keeps your eyepiece in the Barlow instead of relying on the tip of the thumbscrew itself, offering a better grip and protecting the barrel from scratches. \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e  \u003cp class=\"body\"\u003e\u003cspan style=\"font-size:11.0pt;mso-bidi-font-size:12.0pt; font-family:\" arial\u003eThe barrel of the Celestron X-Cel LX 2x Barlow is threaded to accept 1.25  filters, allowing you to change eyepieces without removing and re-attaching the filter from each eyepiece barrel.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e  \u003ch1\u003e\u003cspan style=\"font-size:22.0pt;mso-bidi-font-size:24.0pt;font-family:\" arial mso-fareast-font-family: new roman\u003eSpecifications\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/h1\u003e  \u003ctable class=\"MsoNormalTable\" border=\"0\" cellpadding=\"0\"\u003e  \u003ctbody\u003e\n\u003ctr\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:11.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003eMagnification   (x)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-size:11.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:11.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e2 x\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:11.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003eOptical   Coatings\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-size:11.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:11.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003eFully   Multi Coated\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e  \u003c\/tr\u003e \u003c\/tbody\u003e\n\u003c\/table\u003e  \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:11.0pt;mso-bidi-font-size:12.0pt; font-family:\" arial new roman\u003e \u003c\/span\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44013261389935,"sku":"93529","price":173.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/93529_X_252520Cel_LX_1-25_2x_Barlow_Lens_1__27627.1682639923.1280.1280.jpg?v=1766550396"},{"product_id":"luminos-2-5x-barlow1-25-2","title":"Luminos 2.5x Barlow1.25-2\"","description":"\u003ch1\u003e\u003cspan style=\"font-size:20.0pt;mso-bidi-font-size:24.0pt;font-family:\" arial mso-fareast-font-family: new roman\u003eOverview\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/h1\u003e  \u003cul type=\"disc\"\u003e  \u003cli class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;      mso-bidi-font-size:12.0pt;font-family:\" arial new roman\u003eThe Celestron 2.5x Luminos Barlow increases the      magnification of any 2  or 1.25  eyepiece by two and a half times.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/li\u003e  \u003cli class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;      mso-bidi-font-size:12.0pt;font-family:\" arial new roman\u003eHigh-quality 4-element optics produce a flat field for      sharp images that are free of extraneous color.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/li\u003e  \u003cli class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;      mso-bidi-font-size:12.0pt;font-family:\" arial new roman\u003eHard-anodized aluminum barrel is threaded to accept 2       filters.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/li\u003e  \u003cli class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;      mso-bidi-font-size:12.0pt;font-family:\" arial new roman\u003eA brass compression ring holds eyepieces firmly in      place, and large thumbscrews are easy to turn, even with gloves on.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/li\u003e  \u003cli class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;      mso-bidi-font-size:12.0pt;font-family:\" arial new roman\u003eA 2  to 1.25  adapter is included.  Allows the use      of both 2  and 1.25  eyepieces.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/li\u003e \u003c\/ul\u003e  \u003ch1\u003e\u003cspan style=\"font-size:20.0pt;mso-bidi-font-size:24.0pt;font-family:\" arial mso-fareast-font-family: new roman\u003eDescription\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/h1\u003e  \u003cp class=\"body\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt; font-family:\" arial\u003eThe Celestron 2  Luminos Barlow Lens increases the magnification of your 2  and 1.25  eyepieces by 2.5x.  The premium 4-element apochromatic optics are fully multi-coated for optimum light transmission and yield high contrast, true color images.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e  \u003cp class=\"body\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt; font-family:\" arial\u003eThe beautiful hard-anodized aluminum housing matches the eyepieces in the Celestron Luminos line.  A centralized rubber grip helps to keep your hands securely on the barrel, even when your fingers are cold or you are wearing gloves.  A brass compression ring just inside the top of the Luminos 2.5x Barlow grabs your 2  eyepieces gently but firmly when you turn the oversized thumbscrew.  Once the thumbscrew has been secured in place, the brass ring keeps your eyepiece in the Barlow instead of relying on the tip of the thumbscrew itself, offering a better grip and protecting the barrel from scratches.   A matching 2  to 1.25  adapter is included so that you can increase the magnification of all of your eyepieces, both 1.25  and 2 , in this versatile Barlow lens. \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e  \u003cp class=\"body\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt; font-family:\" arial\u003eThe insert barrel of the Celestron Luminos 2.5x Barlow is threaded to accept 2  filters.  This is a nice feature, because you can change eyepieces without removing and reattaching the filter each time.\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e  \u003ch1\u003e\u003cspan style=\"font-size:20.0pt;mso-bidi-font-size:24.0pt;font-family:\" arial mso-fareast-font-family: new roman\u003eSpecifications\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/h1\u003e  \u003ctable class=\"MsoNormalTable\" border=\"0\" cellpadding=\"0\"\u003e  \u003ctbody\u003e\n\u003ctr\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003eMagnification   (x)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e2.5   x\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003eOptical   Coatings\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003eFully   Multi-Coated\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003eWeight   (oz)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e11   oz (312 g)\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003eBarrel   Size (in)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e2\"   in (51 mm)\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003eLength   (mm)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e93   mm (3.66 in)\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003eWidth   (mm)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e64   mm (2.52 in)\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003eFilter   Threads\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003eYes\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003eEyepiece   Adapter\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e1.25\"\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003eCompression   Rings\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003eYes   on both 2  and 1.25  eyepiece holders\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e  \u003c\/tr\u003e  \u003ctr\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003eClear   Aperture (mm)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:   12.0pt;font-family:\" arial new roman\u003e\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e   \u003ctd style=\"padding:.75pt .75pt .75pt .75pt\"\u003e   \u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size:10.0pt;mso-bidi-font-size:12.0pt;   font-family:\" arial new roman\u003e28   mm (1.1 in)\u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e   \u003c\/td\u003e  \u003c\/tr\u003e \u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44013369491567,"sku":"93436","price":222.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/93436_Luminos_2_2-5x_Barlow_Lens_1__88710.jpg?v=1766551576"},{"product_id":"hyperion-zoom-barlow-2-25x","title":"Hyperion Zoom Barlow 2.25X","description":"\u003cspan style=\"font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003eDo you have a Baader Planetarium Hyperion Zoom eyepiece and want even more performance? Then the Baader 2.25X Barlow might just be right for you! The included T2 adapter will allow it to be coupled to any of the 1.25-inch eyepiece holders, or it can be directly attached to a 1.25-inch eyepieces threads with the other included adapter.\u003c\/span\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003eAble to be used with any eyepiece that's designed with a 1.25-inch thread, the Baader Planetarium modular design of the 2.25X Triplet Hyperion Zoom Barlow allows for a wide variety of configurations to suit your every need. The primary optical body can be used with either supplied adapter to mate it to a 1.25-inch eyepiece - or the T-Adapter which connects with optional T-Rings for use as a photo projection lens. What's more, you can also change the magnification levels through the use of optional additional 1.25-inch or T-thread spacers or extension tubes.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 10px; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\u003cspan style=\"box-sizing: border-box;\"\u003e\u003cspan style=\"box-sizing: border-box; font-weight: 700;\"\u003eBaader 2.25X Triplet Hyperion Zoom Barlow with T-Adapter Features:\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cul style=\"box-sizing: border-box; font-family: Interstate-Light, sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);\"\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eOptically Matched for perfect optical performance with the Hyperion 8-24 mm Clickstop Zoom.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eAnastigmatic Flatfield Design.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eAir-spaced triplet lens.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eBaader Phantom Group Coatings on all air-glass surfaces\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eFully internally baffled and blackened to eliminate stray light reflections\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eEnables dual 2-inch\/ 1.25-inch Barrel Configuration with all Baader Hyperion Clickstop Zooms (MkI to MkIII)\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eThreaded for standard 1.25-inch filters.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box;\"\u003eModular Design.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013458030703,"sku":"HYP-BARLOW","price":219.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Hype-barlow_2525201__40219.1682640175.1280.1280.jpg?v=1766553556"},{"product_id":"x-cel-lx-3x-barlow-lens-1-25","title":"X-CEL LX 3X BARLOW LENS - 1.25\"","description":"\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003eWhen inserted between the eyepiece and telescope, this premium 3x Barlow lens triples the magnification of all your 1.25” eyepieces. This is a perfect accessory for owners of short, fast telescopes, and is especially helpful for boosting the magnification during lunar or planetary observations under good seeing conditions. The apochromatic, fully multi-coated optics offer great color correction and contrast.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px 0px 15px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003eThe black anodized housing with orange highlights matches the eyepieces in the Celestron X-Cel LX line. A centralized rubber grip helps to keep your hands securely on the barrel, even when your fingers are cold or you are wearing gloves. A brass compression ring just inside the top of the X-Cel Barlow grabs your eyepiece gently but firmly when you turn the thumbscrew. Once the thumbscrew has been secured in place, the brass ring keeps your eyepiece in the Barlow instead of relying on the tip of the thumbscrew itself, offering a better and protecting the barrel from scratches.\u003c\/p\u003e\u003cp style=\"box-sizing: inherit; margin: 0px; padding: 0px; color: rgb(51, 62, 72); font-family: \" open sans arial helvetica sans-serif font-size:=\"\"\u003eThe barrel of the Celestron X-Cel LX 3X Barlow is threaded to accept 1.25” filters, allowing you to change eyepieces without requiring you to remove and re-attach the filter from each eyepiece barrel.\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":44013594017903,"sku":"93428","price":173.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/93428-Ex-Cel-3x-Barlow_01_570x3802x__98564.jpg?v=1766557241"},{"product_id":"antares-1-5x-barlow","title":"Antares 1.5X Barlow","description":"\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: #404040; font-family: arial, sans-serif; font-size: 12px; background-color: #ffffff;\"\u003eIdeal 1.5x for achieving focus on short focal length telescopes.\u003c\/p\u003e\n\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: #404040; font-family: arial, sans-serif; font-size: 12px; background-color: #ffffff;\"\u003eThis barlow lens features a twist lock mechanism which makes your eyepiece\/camera centralized. This makes more of the stars focused so it is far better for astrophotography. Objects that are in the center of the field are more likely to be pin points.\u003c\/p\u003e\n\u003cp style=\"box-sizing: border-box; -webkit-font-smoothing: subpixel-antialiased; margin: 1em 0px; line-height: 18px; color: #404040; font-family: arial, sans-serif; font-size: 12px; background-color: #ffffff;\"\u003eThis high-performance Antares Barlow features large 26mm-diameter optical elements (great for use with a wide range of eyepieces) and a fully multi-coated achromatic design with edge-blackened lenses for maximum contrast. The 'short' design ensures that it will work with star diagonals. The Barlow is ideal for use with low-powered (long focal length) eyepieces to deliver higher powers, but with maximum eye-relief and viewing comfort. It is also very useful for webcam imaging and other astro-photographic applications. This super-quality Barlow achieves high-powered views with a high standard of colour correction ideal for planetary and lunar observing\u003c\/p\u003e","brand":"Antares","offers":[{"title":"Default Title","offer_id":44014033600623,"sku":"UB1.5","price":66.0,"currency_code":"CAD","in_stock":true}]},{"product_id":"takahashi-ortho-extender-4x","title":"Takahashi Ortho Extender 4X Barlow-Type Extender","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Ortho Extender 4X is Takahashi's high-power extender for lunar, planetary, and small-target imaging. It follows the same design goal as the 2x Ortho Extender — expanding focal length without adding aberration to an already well-corrected telescope. The unit threads onto the focuser drawtube with an M43 x 0.75 male fitting, measures 46 mm in diameter by 125 mm long, and has a published weight of 240 g.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you image the Moon, the solar corona during an eclipse, or small planetary nebulae and galaxies with a small-sensor camera, and want more reach from a telescope you already own. It also serves visual observers chasing high magnification with contrast intact.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal 4x magnification:\u003c\/strong\u003e extends focal length roughly fourfold, with the realized factor set by the backfocus in the imaging or visual train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM43 x 0.75 male mount:\u003c\/strong\u003e threads directly to a Takahashi drawtube or accessory with the matching female thread.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo extension tubes included:\u003c\/strong\u003e the Vari-tube S (20 mm) and Vari-tube L (40 mm), plus an M42-31.7AD adapter, to bring the achieved magnification toward 4x with a diagonal or ADC in the train.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact aluminum barrel:\u003c\/strong\u003e 46 mm diameter, 125 mm length, 240 g.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eLike the 2x Ortho Extender, the 4x unit is built so an aberration-free telescope stays that way with the extender in place — it adds magnification rather than correcting anything. As a Barlow-type element, the realized magnification is a function of the spacing behind it: Takahashi's published diagram for the 2x model plots magnification against backfocus, and the same relationship governs the 4x unit, moving above or below the nominal 4x figure depending on whether a diagonal prism, T-mount, or direct eyepiece follows it. The two included Vari-tubes exist to bring that spacing back toward the point where the 4x figure holds.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eLunar close-ups, solar eclipse corona photography, and planetary imaging with small-format CMOS cameras are the stated use cases. For visual work it holds contrast at high power, useful for double-star splitting and fine lunar detail.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Ortho Extender 4X mounts to any Takahashi focuser or accessory presenting an M43 x 0.75 female thread — it is not built around one telescope model the way a matched flattener is. Because the achieved magnification depends on backfocus, a diagonal, T-mount, or ADC behind it shifts the effective factor slightly; the included Vari-tube S\/L extensions and M42-31.7AD adapter let you dial the spacing in. For how backfocus interacts with the rest of your imaging train, see the \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eMagnification varies with spacing:\u003c\/strong\u003e the published 4x figure assumes a specific backfocus, and a diagonal or camera adapter behind it shifts the realized power — the included extension tubes are there to compensate.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFraming narrows at 4x:\u003c\/strong\u003e the field of view is well suited to high-power lunar and planetary targets rather than wide-field deep-sky framing.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo — it threads directly onto the drawtube's M43 x 0.75 thread. Getting the magnification close to the nominal 4x is a matter of choosing between the included Vari-tube S and L depending on what follows it in the train.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHigh-power lunar, planetary, and solar-eclipse imaging, and high-magnification visual observing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it suit wide-field deep-sky imaging?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo — at 4x the field narrows well past what wide-field framing needs; the 2x Ortho Extender or a dedicated reducer suits that work better.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat accessories come with it?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Vari-tube S (20 mm) and Vari-tube L (40 mm) extension tubes and an M42-31.7AD adapter ship with the unit.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Ortho Extender 4X is a compact, aberration-neutral way to add roughly four times the focal length for lunar, planetary, and solar-eclipse work, mounting on the standard M43 x 0.75 thread and shipping with the extension tubes needed to fine-tune the magnification for your train.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047112527983,"sku":"TAK-TKA00831","price":421.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/tka00831-1_1.jpg?v=1786914045"},{"product_id":"takahashi-ortho-extender-2x-barlow","title":"Takahashi Ortho Extender 2x Barlow","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Ortho Extender 2x is Takahashi's 2x Ortho Barlow: a 130 g, 46 mm x 91 mm barlow lens with a 31.7 mm (1.25\") input barrel, designed to double focal length without adding aberration to an already well-corrected telescope. Unlike a fixed 2x Barlow, its actual magnification is a function of back focus — published by Takahashi as M = 2 + 0.0121 × b, where b is the distance in mm behind the Barlow. At zero back focus it is exactly 2.00x; add distance behind it, as a diagonal or T-mount train does, and the figure climbs from there.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is what you need if you observe or image the moon, planets or double stars and want to reach beyond your eyepiece set's shortest focal length — or add reach for a small-sensor camera — without introducing the aberration a lower-quality Barlow adds.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe magnification formula is the part worth understanding before you buy. Takahashi publishes three reference points: at 0 mm of back focus — an eyepiece inserted directly — magnification is exactly 2.00x. Behind a T-mount train (roughly 50 mm of back focus), it works out to about 2.61x. Behind a prism star diagonal, at 63.5 mm of back focus, it reaches 2.77x. The lens design — two elements in one group — is built to hold correction across that whole range rather than being optimized for one fixed spacing, and for visual use it is parfocal: swapping eyepieces at a given back focus does not require refocusing. On the camera side, the barrel is a 31.7 mm female sleeve with an M42 x 0.75 male T-thread built in, so it accepts a T-mount directly as well as a standard 1.25\" eyepiece or camera nosepiece.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-power lunar and planetary observation\u003c\/strong\u003e with your existing 1.25\" eyepieces, at roughly 2x their marked magnification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall-sensor planetary and lunar imaging\u003c\/strong\u003e through the T-thread, where the extra reach concentrates detail on a small chip.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble star splitting\u003c\/strong\u003e at the higher power the 2x factor provides.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe barrel accepts standard 31.7 mm (1.25\") accessories on the input side. On the output side, the built-in M42 x 0.75 thread takes a T-mount directly, or a 1.25\" eyepiece for direct visual use. Because the actual magnification depends on what sits behind the Barlow — a diagonal, a T-mount adapter, or nothing at all — the figure to check is your own back focus, not a single quoted number. If you want your exact magnification worked out for your eyepiece, diagonal or camera train, send us the details and we will calculate it with you.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eMagnification is not a single fixed number.\u003c\/strong\u003e It runs from 2.00x at zero back focus up to 2.77x behind a prism diagonal, per Takahashi's published formula. Check where your accessory sits in that range before assuming a flat 2x.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs it difficult to set up?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo — it drops into the eyepiece holder or camera train like any 1.25\" accessory, with no adjustment needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy isn't the magnification always exactly 2x?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBecause a Barlow's power depends on how far behind it the image forms. Takahashi publishes the relationship as M = 2 + 0.0121 × b: 2.00x with an eyepiece inserted directly, climbing to 2.77x with 63.5 mm of back focus behind a prism diagonal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it work for imaging as well as visual use?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes — the built-in M42 x 0.75 T-thread takes a camera directly, and the parfocal design means eyepiece and camera views stay in focus together at a given spacing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLunar and planetary work — visual or imaged — where extra reach on your existing eyepieces or a small sensor is the goal.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a 130 g, parfocal 2x Barlow whose real magnification runs from 2.00x to 2.77x depending on what's behind it — tell us your eyepiece or camera train and we'll work out your number.\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/takahashi-2x-ortho-barlow-tka00598-magnification-chart.jpg?v=1786913723\" alt=\"Takahashi 2x Ortho Barlow magnification versus back focus chart, magnification equals 2 plus 0.0121 times back focus in millimeters\" style=\"max-width:100%;height:auto;\"\u003e\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047112560751,"sku":"TAK-TKA00830\/TKA00598","price":263.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/TKA00598_1.jpg?v=1786914045"}],"url":"https:\/\/ontariotelescope.com\/collections\/eyepiece-barlows.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}