{"product_id":"takahashi-extender-c2x-extender","title":"Takahashi Extender-C2X Extender","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Extender-C2X extends focal length on the FS-60CB, FC-76D and FC-100D. Takahashi's own naming — the \"C2X\" designation — follows the same convention as its other 2x extenders, and the part is built to lengthen the focal length of these doublets without adding measurable aberration of its own.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThis is what you need if you own an FS-60CB, FC-76D or FC-100D and want to reach a longer effective focal length for tighter framing — small planetary nebulae, galaxies, or lunar and planetary detail — without changing telescopes.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eOptical \/ Mechanical Design\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eAn extender lengthens the light path between the objective and the focal plane, which increases effective focal length and focal ratio without touching the objective itself. Takahashi builds its extenders to add that length while holding the telescope's own correction, rather than introducing new aberration the objective wasn't designed for — the same principle behind the \u003ca href=\"\/products\/takahashi-ortho-extender-2x-barlow\"\u003eOrtho Extender 2x Barlow\u003c\/a\u003e used elsewhere in the line.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTighter framing on small targets\u003c\/strong\u003e — planetary nebulae, small galaxies, lunar and planetary detail — on the FS-60CB, FC-76D or FC-100D.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtending an existing FC or FS doublet\u003c\/strong\u003e rather than buying a longer-focal-length telescope.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe Extender-C2X is matched to the FS-60CB, FC-76D and FC-100D. If you want to confirm it fits your specific imaging train before ordering, send us your telescope and camera and we will work it out with you.\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\u003eIt fits into the imaging train on the FS-60CB, FC-76D or FC-100D the same way any extender does — in line between the telescope and camera. Send us your setup and we will confirm the exact fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is it best used for?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eReaching a longer effective focal length on a small FC or FS doublet for tighter framing on small targets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it work for visual observing?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eIt is built for the photographic train on these telescopes; if you want to use it visually, send us your eyepiece setup and we will confirm the fit.\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eIn short: a focal-length extender for the FS-60CB, FC-76D and FC-100D, built to lengthen the light path without adding aberration of its own.\u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":54047109447791,"sku":"TAK-TKA00594","price":155.87,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/TKA00594_1.jpg?v=1786913952","url":"https:\/\/ontariotelescope.com\/products\/takahashi-extender-c2x-extender","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}