dr5chrome Posted March 27, 2021 Share Posted March 27, 2021 Hello all. I picked up a decent singer 16d. I've been testing it the past several days. I understand that the 16d and taking lens need to be distance matched. But in practice the 16d and taking lens never jive (numbers). I don't care if the edges are soft, but the center is another matter. I can't get this scope sharp, no matter what taking lens. Seems it is sharp in the viewer, and the camera says it's in focus, but the taken image is far from in focus Is this 16d just not sharp? Is there something wrong with it? ..if so is it fixable? Thanks for the help!.. dw Quote Link to comment Share on other sites More sharing options...
au8ust Posted March 27, 2021 Share Posted March 27, 2021 Try to verify the infinity focus first. Check this video https://www.cinesaga.com/courses/anamorphic-course/541614-chapter-7-putting-it-all-together/1605145-perfect-infinity-tuning If you can get sharp focus at infinity, then your scope is fine. Quote Link to comment Share on other sites More sharing options...
dr5chrome Posted March 27, 2021 Author Share Posted March 27, 2021 Thanks. I'll try that today.. but I don't have a variable diopter Quote Link to comment Share on other sites More sharing options...
au8ust Posted March 28, 2021 Share Posted March 28, 2021 Just check both taking lens and anamorphic lens. If they can focus at infinity with good sharpness, then there's nothing wrong with your lenses, probably. Quote Link to comment Share on other sites More sharing options...
dr5chrome Posted March 28, 2021 Author Share Posted March 28, 2021 7 hours ago, au8ust said: Just check both taking lens and anamorphic lens. If they can focus at infinity with good sharpness, then there's nothing wrong with your lenses, probably. Hello again. I have 3 scopes that I am testing with, the Singer 16D, an ISCO ultra star-red, and the very large older ISCO. I did the infinity test. Only the very large older ISCO was razor sharp. The other 2 were not quite where I expected them to be and they both behaved the same. Through the viewer they seemed sharp but the taken image was soft [in the center]. My taken lens is a biotar or a takumar 55. The ultra star red was the worst. The closest infinity focus was far off the mark on the scope where it was sharpest. The 16D was not as bad but was still off. Anyone have a tune up direction / disassembly for the 16D and ultra star-red? I am mechanical but have not experience with these lenses. Thanks. dw Quote Link to comment Share on other sites More sharing options...
au8ust Posted March 28, 2021 Share Posted March 28, 2021 Don't rely on the focus scale on the lens, they are usually off. For 16-D dissemble, check https://www.youtube.com/watch?v=fYyK-HPo7_w Quote Link to comment Share on other sites More sharing options...
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