{"product_id":"takahashi-gt-40-guide-scope-tgt04000","title":"Takahashi GT-40 Guide Scope (TGT04000)","description":"\u003ch2\u003eTakahashi GT-40 Guide Scope\u003c\/h2\u003e\n\u003cp\u003eGuiding in astrophotography may require the installation of a secondary telescope in parallel with the main instrument. For this purpose, Takahashi has designed a specific accessory, very close to a classic finder scope: the GT-40 guiding scope. Its very short focal length, 240 mm, allows a large field of view which facilitates the search for a guiding star.\u003c\/p\u003e\n\u003cp\u003eThe GT-40 has a 31.75 mm eyepiece holder, which is compatible with all commercially available autoguiding cameras. The image on the camera is focused by rotating the GT-40's lens cell with a thumbwheel. The metal back distance behind the refractor can therefore vary from 0 to 21.5 mm, depending on the needs of camera's backfocus.\u003c\/p\u003e\n\u003cp\u003eIt is possible to mount the GT-40 directly on Takahashi cradles and plates. Indeed, the steady rest has 2 sets of 2 tappings with 35 mm centres, with M8 and M5 threads. A Kodak thread (1\/4\"-20) is available in the centre of the mounting plate for users of other brands. However, it is recommended that M5 and M8 threads are used to avoid unintentional rotation of the mount on its base.\u003c\/p\u003e\n\u003cp\u003eTakahashi proposes in option 2 devices facilitating the adjustment of the parallelism, in azimuth and in height: a standard L-clamp [TGT04010] and AZ Guidescope Mount [TAZ70120].\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;\" data-mce-style=\"text-align: center;\"\u003eCHARACTERISTIC\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eTAKAHASHI GT-40 GUIDING SCOPE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eDiameter\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eFocal length\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e240 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eFocal ratio\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eF\/6.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003eMetal Back Distance\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\" data-mce-style=\"text-align: center;\"\u003e0 to 21.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable style=\"width: 454px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 159.703px; text-align: center;\"\u003eBottom plate\u003c\/td\u003e\n\u003ctd style=\"width: 276.297px; text-align: center;\"\u003e2 x M8 threads + 1 Kodak 1\/4\"-20 thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 159.703px; text-align: center;\"\u003eTop plate\u003c\/td\u003e\n\u003ctd style=\"width: 276.297px; text-align: center;\"\u003e2 x M5 threads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 159.703px; text-align: center;\"\u003eEyepiece holder\u003c\/td\u003e\n\u003ctd style=\"width: 276.297px; text-align: center;\"\u003e1.25\" (31.75 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 159.703px; text-align: center;\"\u003eLength\u003c\/td\u003e\n\u003ctd style=\"width: 276.297px; text-align: center;\"\u003e272 mm (with dew shield)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 159.703px; text-align: center;\"\u003eWidth\u003c\/td\u003e\n\u003ctd style=\"width: 276.297px; text-align: center;\"\u003e58 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 159.703px; text-align: center;\"\u003eHeigth\u003c\/td\u003e\n\u003ctd style=\"width: 276.297px; text-align: center;\"\u003e64 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 159.703px; text-align: center;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"width: 276.297px; text-align: center;\"\u003e570 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 159.703px; text-align: center;\"\u003eFocuser\u003c\/td\u003e\n\u003ctd style=\"width: 276.297px; text-align: center;\"\u003eRotation of the front lens cell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3\u003e In the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTakahashi GT-40 Guide Scope\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eManual \u0026amp; Warranty\u003c\/h3\u003e\n\u003cp\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\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Takahashi","offers":[{"title":"Default Title","offer_id":44135225262309,"sku":"TAK-TGT04000","price":612.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0652\/6245\/2965\/files\/takahashi-gt-40-guide-scope-tgt04000-astronomy-plus-1.jpg?v=1690491800","url":"https:\/\/istronomyplus.com\/products\/takahashi-gt-40-guide-scope-tgt04000","provider":"Astronomy Plus – Telescopes \u0026 Astrophotography Canada","version":"1.0","type":"link"}