{"title":"Sharpstar EDPH Refractors","description":"\u003cp\u003eSharpstar's EDPH refractors are compact APOs for wide-field imaging: the 50EDPH 50mm f\/5.5 and 61EDPH III 61mm f\/5.9 triplets, and the larger 94EDPH. Part of \u003ca href=\"\/collections\/refractors\"\u003eRefractor Telescopes\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"sharpstar-94edph","title":"Sharpstar 94EDPH","description":"\u003cp class=\"MsoNormal\"\u003e\u003cstrong\u003e\u003cspan arial=\"\" sans-serif=\"\" mso-fareast-font-family:=\"\" microsoft=\"\" yahei=\"\" color:black=\"\" mso-color-alt:windowtext=\"\" background:white=\"\"\u003eDiscontinued\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan arial=\"\" sans-serif=\"\" mso-fareast-font-family:=\"\" microsoft=\"\" yahei=\"\" color:black=\"\" mso-color-alt:windowtext=\"\" background:white=\"\"\u003eThe brand new 94EDPH is the third type of this Sharpstar EDPH family. Its aperture size is 94mm and the focal length is 517mm, thus the focal ratio is f\/5.5. 94EDPH is designed with triplet air-spaced APO lens structure, including two pieces of ED(extra-low dispersion) glass, which empowers the astragraph to achieve more effective aberration amendment thus to produce more accurate images. With its innate compactness, fashionable appearance, and above all, superb quality, Sharpstar 94EDPH can be applied to both high-end sky-observation and sophisticated astrophotograph.\u003c\/span\u003e\u003cspan arial=\"\" sans-serif=\"\" mso-fareast-font-family:=\"\" microsoft=\"\" yahei=\"\"\u003e\u003cbr style=\"font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; word-spacing: 0px;\"\u003e\u003cspan style=\"color: black; mso-color-alt: windowtext; background: white;\"\u003e\u003cspan style=\"font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; word-spacing: 0px;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; word-spacing: 0px;\"\u003e\u003cspan style=\"color: black; mso-color-alt: windowtext; background: white;\"\u003e\u003cspan style=\"font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; word-spacing: 0px;\"\u003eSharpstar 94EDPH shares the same reducer with its sibling, 76EDPH, which may greatly relieve the inconvenience and troublesome in swapping the 76 to 94.\u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; word-spacing: 0px;\"\u003e\u003cspan style=\"color: black; mso-color-alt: windowtext; background: white;\"\u003e\u003cspan style=\"font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; word-spacing: 0px;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; word-spacing: 0px;\"\u003e\u003cspan style=\"color: black; mso-color-alt: windowtext; background: white;\"\u003e\u003cspan style=\"font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; word-spacing: 0px;\"\u003eThe reducer can reduce the original focal ratio to f\/4.5, supporting full-frame imaging, opening up for our customers more possibilities in exploring the universe.\u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; word-spacing: 0px;\"\u003e\u003cspan style=\"color: black; mso-color-alt: windowtext; background: white;\"\u003e\u003cspan style=\"font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; word-spacing: 0px;\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cbr style=\"font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; word-spacing: 0px;\"\u003e\u003cspan style=\"color: black; mso-color-alt: windowtext; background: white;\"\u003e\u003cspan style=\"font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; float: none; word-spacing: 0px;\"\u003eSharpstar 94EDPH must be an ideal choice, worthy of consideration, if you are looking for a large-aperture, fast-focal-ratio, quality and lightweight APO refractive telescope.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan arial=\"\" sans-serif=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Sharpstar","offers":[{"title":"Yes \/ Yes \/ Yes","offer_id":44013649920111,"sku":"94EDPH","price":2844.99,"currency_code":"CAD","in_stock":true},{"title":"Yes \/ Yes \/ No","offer_id":44013649952879,"sku":"94EDPH","price":2809.99,"currency_code":"CAD","in_stock":true},{"title":"Yes \/ No \/ Yes","offer_id":44013649985647,"sku":"94EDPH","price":2809.99,"currency_code":"CAD","in_stock":true},{"title":"Yes \/ No \/ No","offer_id":44013650018415,"sku":"94EDPH","price":2774.99,"currency_code":"CAD","in_stock":true},{"title":"No \/ Yes \/ Yes","offer_id":44013650051183,"sku":"94EDPH","price":2455.0,"currency_code":"CAD","in_stock":true},{"title":"No \/ Yes \/ No","offer_id":44013650083951,"sku":"94EDPH","price":2420.0,"currency_code":"CAD","in_stock":true},{"title":"No \/ No \/ Yes","offer_id":44013650116719,"sku":"94EDPH","price":2420.0,"currency_code":"CAD","in_stock":true},{"title":"No \/ No \/ No","offer_id":44013650149487,"sku":"94EDPH","price":2385.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/1591847767__59846.jpg?v=1766558632"},{"product_id":"sharpstar-61-edph-iii","title":"Sharpstar 61EDPH III 61mm f\/5.9 Triplet APO Refractor","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Sharpstar 61EDPH III is a compact 61mm f\/5.9 triplet APO refractor designed for portable observing and wide-field astrophotography. With a 360mm focal length, two ED glass elements, and support for a 44mm full-frame image circle when used with the appropriate corrector, it is a versatile telescope for travel rigs, lightweight mounts, and imaging setups.\u003c\/p\u003e\u003cp\u003eThis third-generation 61EDPH improves the optical design, tube mechanics, handle, and dovetail system compared with earlier versions, making it easier to balance and configure for both visual and imaging use.\u003c\/p\u003e\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\u003cp\u003eThis telescope is a strong choice for beginner-to-intermediate astrophotographers, travel imagers, wide-field deep-sky photographers, and visual observers who want a compact APO refractor. It is also useful for experienced imagers who want a lightweight secondary imaging scope.\u003c\/p\u003e\u003ch2\u003eWhy Choose This Product?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eTriplet air-spaced APO objective with two ED glass elements.\u003c\/li\u003e\n\u003cli\u003e61mm aperture and 360mm focal length for wide-field imaging.\u003c\/li\u003e\n\u003cli\u003eCompact OTA weight makes it suitable for portable mounts.\u003c\/li\u003e\n\u003cli\u003e200mm Vixen-style dovetail helps balance cameras and accessories.\u003c\/li\u003e\n\u003cli\u003eMultifunction handle can accept a universal Vixen-style finder base.\u003c\/li\u003e\n\u003cli\u003eCompatible with optional dedicated full-frame reducer and flattener.\u003c\/li\u003e\n\u003cli\u003eReducer option converts the system to approximately 270mm at f\/4.4.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWide-field nebula and Milky Way imaging.\u003c\/li\u003e\n\u003cli\u003eTravel astrophotography setups.\u003c\/li\u003e\n\u003cli\u003ePortable deep-sky imaging on compact equatorial or strain-wave mounts.\u003c\/li\u003e\n\u003cli\u003eVisual observing of bright deep-sky objects and wide star fields.\u003c\/li\u003e\n\u003cli\u003eBeginner-friendly APO refractor imaging when paired with a suitable mount and corrector.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\u003cp\u003eThe 61EDPH III can be paired with Sharpstar’s dedicated 61EDPH III full-frame reducer or full-frame flattener. The reducer uses an M68×1 connection to the focuser and provides an M48×0.75 camera-side thread with 55mm back focus, or M54×0.75 with 75mm back focus when the adapter is removed. The flattener also uses M68×1 to the focuser and M48×0.75 camera-side connection with 55mm back focus, or M54×0.75 with 81.5mm back focus when extended.\u003c\/p\u003e\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFor best astrophotography results, use the dedicated reducer or flattener.\u003c\/li\u003e\n\u003cli\u003eThe reducer and flattener are separate accessories unless specifically bundled.\u003c\/li\u003e\n\u003cli\u003eMount capacity, guiding, camera spacing, and backfocus accuracy still matter.\u003c\/li\u003e\n\u003cli\u003eSmall aperture limits high-power planetary and faint visual observing performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs the 61EDPH III good for beginners?\u003c\/h3\u003e\u003cp\u003eYes, it can be a very good beginner imaging refractor when paired with a suitable mount, camera, and corrector. It is compact, forgiving, and well suited to wide-field targets.\u003c\/p\u003e\u003ch3\u003eWhat is it best used for?\u003c\/h3\u003e\u003cp\u003eIt is best for wide-field astrophotography, portable deep-sky imaging, and travel-friendly visual observing.\u003c\/p\u003e\u003ch3\u003eDoes it require additional accessories for imaging?\u003c\/h3\u003e\u003cp\u003eFor the best star shapes across larger sensors, use the dedicated 61EDPH III reducer or flattener. Camera adapters, guide equipment, and filters may also be required depending on the setup.\u003c\/p\u003e\u003ch3\u003eCan it cover full-frame cameras?\u003c\/h3\u003e\u003cp\u003eThe optical system supports full-frame imaging when used with the appropriate dedicated Sharpstar full-frame reducer or flattener.\u003c\/p\u003e\u003ch3\u003eWhen should it not be recommended?\u003c\/h3\u003e\u003cp\u003eIt is not ideal if the customer’s main goal is high-magnification planetary observing, very small galaxies, or maximum visual light gathering.\u003c\/p\u003e\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\u003cp\u003eOntario Telescope recommends the Sharpstar 61EDPH III for customers who want a small, high-quality APO refractor that can grow from visual use into serious wide-field astrophotography. Choose it for portability and flexibility. Choose a larger aperture telescope if your priority is high-power visual observing or small deep-sky targets.\u003c\/p\u003e","brand":"Sharpstar","offers":[{"title":"Default Title","offer_id":44013897121903,"sku":"61EDPHIII","price":847.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/61_edphiii__56593.jpg?v=1766565937"},{"product_id":"sharpstar-50edph-50mm-f-5-5-triplet-apo-refractor","title":"Sharpstar 50EDPH 50mm f\/5.5 Triplet APO Refractor","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThe Sharpstar 50EDPH is a compact 50mm f\/5.5 triplet APO refractor designed for portable wide-field astrophotography, travel imaging, and lightweight observing setups. With a 275mm focal length and ED glass triplet optics, it is built for customers who want a small, capable refractor that can ride on compact mounts and travel easily.\u003c\/p\u003e\u003cp\u003eThe 50EDPH is especially useful as a grab-and-go imaging telescope, a travel refractor, or a wide-field companion scope for larger systems.\u003c\/p\u003e\u003ch2\u003eWho Is This Product Best For?\u003c\/h2\u003e\u003cp\u003eThis telescope is best for beginner and intermediate astrophotographers who want a small APO imaging platform, travel users who need a light optical tube, and experienced imagers looking for a compact wide-field refractor.\u003c\/p\u003e\u003ch2\u003eWhy Choose This Product?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e50mm triplet APO optics for a compact but corrected optical system.\u003c\/li\u003e\n\u003cli\u003e275mm focal length and f\/5.5 focal ratio for wide-field targets.\u003c\/li\u003e\n\u003cli\u003eVery portable size for travel imaging and lightweight mount setups.\u003c\/li\u003e\n\u003cli\u003eUseful for large nebulae, Milky Way fields, star fields, and comet imaging.\u003c\/li\u003e\n\u003cli\u003eSmall enough for compact equatorial and strain-wave mounts.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRecommended Uses\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWide-field deep-sky astrophotography.\u003c\/li\u003e\n\u003cli\u003ePortable and travel imaging rigs.\u003c\/li\u003e\n\u003cli\u003eLarge nebulae, star fields, and Milky Way regions.\u003c\/li\u003e\n\u003cli\u003eLightweight visual observing of wide star fields and bright objects.\u003c\/li\u003e\n\u003cli\u003eBeginner imaging setups where portability is important.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility and Accessory Notes\u003c\/h2\u003e\u003cp\u003eFor astrophotography, customers should confirm the required camera-side spacing, adapters, and any dedicated reducer or flattener recommended by Sharpstar for their camera format. A suitable tracking mount, camera adapter, guide setup, and filters may be required depending on the imaging configuration.\u003c\/p\u003e\u003ch2\u003eImportant Limitations\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSmall aperture limits high-magnification planetary use and faint visual observing.\u003c\/li\u003e\n\u003cli\u003eFor best imaging results, a compatible field corrector or reducer\/flattener may be required depending on the camera sensor.\u003c\/li\u003e\n\u003cli\u003eNot intended as a primary telescope for customers who want large-aperture visual performance.\u003c\/li\u003e\n\u003cli\u003eMounting, guiding, and camera spacing still need to be configured correctly.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs the Sharpstar 50EDPH good for beginners?\u003c\/h3\u003e\u003cp\u003eYes, it can be a good beginner imaging refractor because it is small, portable, and forgiving in focal length. It still requires a proper tracking mount and camera setup.\u003c\/p\u003e\u003ch3\u003eWhat is it best used for?\u003c\/h3\u003e\u003cp\u003eIt is best used for wide-field astrophotography, travel imaging, and large deep-sky targets.\u003c\/p\u003e\u003ch3\u003eCan it be used visually?\u003c\/h3\u003e\u003cp\u003eYes, it can be used for lightweight visual observing with the right accessories, but its main strength is portable wide-field imaging.\u003c\/p\u003e\u003ch3\u003eDoes it require additional accessories?\u003c\/h3\u003e\u003cp\u003eAstrophotography setups may require camera adapters, correctors, filters, guide equipment, and accurate spacing depending on the camera being used.\u003c\/p\u003e\u003ch3\u003eWhen should it not be recommended?\u003c\/h3\u003e\u003cp\u003eDo not choose this telescope if the customer wants high-power planetary observing, small galaxies, or maximum visual light gathering.\u003c\/p\u003e\u003ch2\u003eOur Recommendation\u003c\/h2\u003e\u003cp\u003eOntario Telescope recommends the Sharpstar 50EDPH for customers who want a very portable APO refractor for wide-field imaging and travel-friendly setups. It solves the problem of building a light, compact imaging rig without moving into larger and heavier refractors. Choose a larger aperture telescope if visual brightness or high magnification is the main goal.\u003c\/p\u003e","brand":"Sharpstar","offers":[{"title":"Default Title","offer_id":53196076613743,"sku":"50EDPH","price":614.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/sharpstar-50edph-apo-refractor-ota_83689e11-fa66-4e33-850a-c9cb2b14452e.jpg?v=1780935497"}],"url":"https:\/\/ontariotelescope.com\/collections\/refractors-sharpstar.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}