solarboy Posted November 28, 2022 Share Posted November 28, 2022 Hi Does anybody know what the spacing between a cmos camera and a .8 reducer on a 80mm f6 scope . Any tips or info would be appreciated. Solarboy Link to comment Share on other sites More sharing options...
ONIKKINEN Posted November 28, 2022 Share Posted November 28, 2022 Depends on the camera, reducer and scope. Reducers/correctors state what backfocus requirements they have and this can vary slightly depending on the reducer/scope combo. Cameras have different flange distances too. DSLRs often have 44mm, dedicated astro cameras often have 12,5mm or 17,5mm. Link to comment Share on other sites More sharing options...
solarboy Posted November 28, 2022 Author Share Posted November 28, 2022 (edited) I have a zwo533 cmos and a televue 2008 reducer . The scope is a 80mm super triplet lomo f6 Edited November 28, 2022 by solarboy Link to comment Share on other sites More sharing options...
Tomvictor Posted November 28, 2022 Share Posted November 28, 2022 For my TS-PL80 f/6 with TSRED80 0.8 reducer it’s 61mm. Back Focus - distances from the M48 thread to the camera sensor depends on the focal length of the telescope: ♦ Focal Length to 350 mm .... 70 mm ♦ Focal Length to 420 mm .... 65 mm ♦ Focal Length 450-500 mm ... 61 mm ♦ Focal Length 510-600 mm ... 58 mm ♦ Focal Length 610-700 mm ... 57 mm ♦ Focal Length 710-790 mm ... 56 mm ♦ Focal Length from 800 mm .. 55 mm Link to comment Share on other sites More sharing options...
newbie alert Posted November 28, 2022 Share Posted November 28, 2022 3 hours ago, solarboy said: Hi Does anybody know what the spacing between a cmos camera and a .8 reducer on a 80mm f6 scope . Any tips or info would be appreciated. Solarboy Dictated by the scope and reducer but I'd guess it be around 55mn Link to comment Share on other sites More sharing options...
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