{"product_id":"teq0001-extender-q-1-6x-extender-for-takahashi-fsq-106","title":"Takahashi Extender-Q 1.6X for FSQ-106 (Fluorite) and Sky-90","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Extender-Q is a five-element 1.6x tele-extender built for Takahashi's original fluorite FSQ-106 and Sky-90 Petzval refractors. Screwed into the focuser drawtube, it works as a 1.6x visual Barlow and as a photographic and CCD tele-extender, accepting standard 1.25-inch eyepieces and diagonals, with internal threading for filters and an optional upgrade path to 2-inch accessories.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is a good match if you own the original fluorite FSQ-106 or a Sky-90 and want more focal length for lunar, planetary, or small-target imaging, or higher-power visual observing, from a telescope you already own.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFive-element optical design:\u003c\/strong\u003e functions as both a 1.6x visual Barlow and a photographic tele-extender.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1.25-inch accessory compatibility:\u003c\/strong\u003e accepts standard eyepieces and diagonals, with an internal filter thread.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-inch upgrade path:\u003c\/strong\u003e an optional adapter extends compatibility to 2-inch accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect drawtube mount:\u003c\/strong\u003e screws straight into the focuser, no separate adapter required on the FSQ-106 or Sky-90.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis extender serves the earlier fluorite FSQ-106 and the Sky-90 rather than the current FSQ-106EDX4. On the fluorite FSQ-106 it brings the focal ratio from f\/5 to f\/8; on the Sky-90, from f\/5.56 to f\/8.9. Takahashi publishes the resulting focal ratios for both pairings.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eHigher-magnification lunar and planetary imaging and visual observing on an original fluorite FSQ-106 or Sky-90.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is the extender for the \u003cstrong\u003eoriginal fluorite FSQ-106 and Sky-90\u003c\/strong\u003e — both earlier Takahashi models. It is explicitly \u003cstrong\u003enot compatible with the current FSQ-106EDX4\u003c\/strong\u003e (\"New Q\"); that telescope uses the separate Extender-QE 1.6x, which Ontario Telescope also carries. If you are not sure which FSQ-106 generation you own, send us the tube's markings or serial plate and we will confirm the right extender. See the \u003ca href=\"\/pages\/takahashi-back-focus-guide\"\u003eTakahashi Back Focus Guide\u003c\/a\u003e for general spacing reference.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGood to Know Before You Order\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNot for the FSQ-106EDX4:\u003c\/strong\u003e the current \"New Q\" telescope requires the Extender-QE 1.6x instead of this part.\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 screws directly into the focuser drawtube on the FSQ-106 or Sky-90, with no separate adapter needed for the base 1.25-inch configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eHigher-power lunar, planetary, and visual work on the original fluorite FSQ-106 or Sky-90.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this fit my FSQ-106EDX4?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eNo — the FSQ-106EDX4 uses the Extender-QE 1.6x, a different part built for the New Q's 2-inch focuser and 44mm image circle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use it for imaging as well as visual?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYes — Takahashi describes it as both a visual Barlow and a photographic tele-extender.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Extender-Q 1.6x is the matched tele-extender for the original fluorite FSQ-106 and Sky-90, bringing both to roughly f\/8 for higher-power imaging and visual work, with an eyepiece-ready 1.25-inch interface and an optional path to 2-inch accessories.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047118983279,"sku":"TAK-TKA00595","price":690.69,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/teq0001_1_2_5.jpg?v=1786914282","url":"https:\/\/ontariotelescope.com\/products\/teq0001-extender-q-1-6x-extender-for-takahashi-fsq-106","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}