{"product_id":"takahashi-toa-645-flatterner-kit-for-toa-130-tka31587s","title":"Takahashi TOA-645 Flattener kit for TOA-130 (TKA31587S)","description":"\u003ch1\u003eTakahashi TOA-645 Flattener kit for TOA-130\u003c\/h1\u003e\n\u003ch4\u003eThe Takahashi TOA-645 field corrector kit for imaging with TOA-130 refractor\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cp\u003eTakahashi has adapted its TOA-67FL super-reducer to the constraints of digital imaging, with its large CMOS sensors and small pixels.\u003c\/p\u003e\n\u003cp\u003eThe TOA range of refractors are high-end telescopes with amazing performance. Images are extremely sharp and contrasted. The chromatism and the spherical aberration are controlled and perfectly corrected. However, this focus on aberration correction performance results in a greater field curvature than lenses of similar focal length; the image is distorted at the edge of the field, unless a field corrector or focal length reducer is used.\u003c\/p\u003e\n\u003cp\u003eUntil now, there were 2 types of flatteners for the TOA refractors. The 67-FL field flattener corrected an image circle that was oversized compared to the needs of current digital cameras. The quality of the aberration corrections up to 50 mm diameter was not suitable for the sensors requirements. The 35FL corrector, on the other hand, had been designed for a mixed use, photographic and visual, with the obligation to be able to adapt a mirror diagonal to the focus. This compromise did not allow to fully exploit the optical performances of the corrector.\u003c\/p\u003e\n\u003cp\u003eThe new TOA-645 field flattener removes these limitations and provides an optimal optical solution for both TOA models, allowing them to be used at their maximum performance, without any compromise. It is common to all TOA refractors. The corrected image circle has a diameter of 60 mm. The optimal backfocus of each telescope is achieved by using an M72 extension ring specific to each model : #51L for the TOA-130, #51S for the TOA-150. The photo adapter with M54 thread, or CA Ring35, is also common.\u003c\/p\u003e\n\u003cp\u003eThe mechanical input of the TOA-645 flattener is with M72x1 female thread, which makes it compatible with the focusing system of the TOA-130NS as well as with that of the TOA-130NFB and TOA-150B but also with those of the former models.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eCHARACTERISTIC\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003eTAKAHASHI TOA-645 FLATTENER KIT FOR TOA-130\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eFocal length (TOA-130)\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e990 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eFocal ratio (TOA-130)\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e7.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eCorrected image circle diameter\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e60 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eMetal back distance (M72x1 thread)\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e83.7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\"\u003eMetal back distance from CA35 ring (M54x0.75)\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e56.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eMechanical characteristics\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003eCHARACTERISTIC\u003c\/td\u003e\n\u003ctd\u003eTAKAHASHI TOA-645 FLATTENER KIT FOR TOA-130\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical input\u003c\/td\u003e\n\u003ctd\u003eM72x1 male thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical output (field flattener)\u003c\/td\u003e\n\u003ctd\u003eM72x1 female thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical output (CA35)\u003c\/td\u003e\n\u003ctd\u003eM54x0.75 female thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical diameter\u003c\/td\u003e\n\u003ctd\u003e78 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal length\u003c\/td\u003e\n\u003ctd\u003e70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal weight\u003c\/td\u003e\n\u003ctd\u003e360 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eMetal back distance\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/takahashi-europe.com\/assets\/uploads\/AUTRE\/TKA31587S_schema.png\"\u003e\u003c\/p\u003e\n\u003cp\u003eDiagram of threads and focal point position of the Takahashi TOA-645 flattener kit for TOA-130\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eSpot-diagrams\u003c\/h4\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/takahashi-europe.com\/assets\/uploads\/SPOT-DIAGRAMS\/TOA-130_TOA-645_spots.png\"\u003e\u003c\/p\u003e\n\u003cp\u003eSpot-diagram of Takahashi TOA-130 refractor with TOA-645 field corrector\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eIn the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTOA-645 Flatterner kit for TOA-130\u003c\/li\u003e\n\u003cli\u003eAdapter ring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eManual \u0026amp; Warranty \u003c\/h3\u003e\n\u003cdiv id=\"shopify-section-template--16185084641509__description\" class=\"shopify-section\"\u003e\n\u003csection data-section-id=\"template--16185084641509__description\" data-section-type=\"tabbed\" data-url=\"\/\/takahashiamerica.com\/cdn\/shop\/t\/3\/assets\/script.tabbed.js?v=83467205078527531921656105673\" data-carousel-type=\"section\" class=\"container clearfix loaded ignore\"\u003e\n\u003cdiv class=\"nine center text-left bottompad clearfix\"\u003e\n\u003cdiv id=\"description\" class=\"product-desc tab-body tab-body-content tab-body-id-template--16185084641509__description\" role=\"tabpanel\" aria-labelledby=\"tab-description\" tabindex=\"0\"\u003e\n\u003cp class=\"tabindex\"\u003e\u003ca href=\"https:\/\/takahashiamerica.com\/pages\/warranty-service?_pos=1\u0026amp;_psq=warranty\u0026amp;_ss=e\u0026amp;_v=1.0\"\u003eTakahashi 5-Years Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":44154216841445,"sku":"TAK-TKA31587S","price":1004.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/takahashi-toa-645-flattener-kit-for-toa-130-tka31587s-astronomy-plus-1.jpg?v=1690492254","url":"https:\/\/istronomyplus.com\/products\/takahashi-toa-645-flatterner-kit-for-toa-130-tka31587s","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}