dawson Posted March 23, 2013 Share Posted March 23, 2013 If the DSLR is screwed to my telescope at prime focus, where would you put a light pollution filter, or some form of nebula filter? I'm asking as a guy I am in the process of buying a 2.5x Powermate from has some 1.25" filters he's selling but I just wondered where they'd go if I were to use my DSLR at prime focus. Thanks James Link to comment Share on other sites More sharing options...
+RonC Posted March 23, 2013 Share Posted March 23, 2013 I would think only an EOS clip filter James £100+, I use 2" filters on the RD as I use an 80mm ext tube that is 2" threaded. Cheers Ron Link to comment Share on other sites More sharing options...
dawson Posted March 23, 2013 Author Share Posted March 23, 2013 I see. I wasn't dying to filter anything, I was just wondering how I would go about it. Another thing to put on the back burner for now; I'm not a DSO convert just yet! Thanks for getting back Ron and explaining. James Link to comment Share on other sites More sharing options...
dawson Posted March 23, 2013 Author Share Posted March 23, 2013 i could have done, but I don't know him, and if it was something I could use, I didn't want him thinking I was thick and then financially taking advantage of me, plus you guys are friendly and knowledgeable and I knew I'd get a quick and thorough answer here. I know I ask a lot of questions. Sorry. JD Link to comment Share on other sites More sharing options...
Guest Kheldar Posted March 23, 2013 Share Posted March 23, 2013 1.25" filters are not really suitable for DSLR use anyways massive vignetting Link to comment Share on other sites More sharing options...
dawson Posted March 23, 2013 Author Share Posted March 23, 2013 I put a want on asb and he emailed me as he had one and loads of other stuff which he is planning to put on asb sometime; filters, 2" 22mm televue eye piece, 2" filter. Drop me a private message with your email and i'll forward you his email with the items on. He's going to post the powermate on monday. Exciting. I'm just looking forward to some clear nights when i'm free so i can try it out with my cleaned webcam and optics before jupiter does a runner James Link to comment Share on other sites More sharing options...
dawson Posted March 23, 2013 Author Share Posted March 23, 2013 I might get a 1.25" IR filter to screw into the nose piece which felix said i could have for my webcam (it's currently got a 35mm film canister as a nose piece; i told you it was cheap! James Link to comment Share on other sites More sharing options...
Guest ben72 Posted April 3, 2013 Share Posted April 3, 2013 i use a T2 adapter, or a 48mm for my coma corrector, both with screw theads. then use 2" LP filter the only draw back is if you want to change filters, ie: RGBL filters you would have to remove the camera to change them. Link to comment Share on other sites More sharing options...
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