I just purchased a flip mirror to align my webcam and am now facing the challenge of extending the focal point back about 2.5 inches to accomocdate mirror box. i know there was an article in S&T back in October 2001 but for some reason I am missing that issue. The dog ate it!!! I have a rather nice pair of coated cemented achromates 34 mm x 165 mm fl that I would like to integrate as a 1:1 relay lens. I've already integrated a rather fast achromat plus negative achromat as a corrector lens for color aberation.
While this has provided the extended focal length I need, it also increases magnification x5. Not that I am complaining, the contrast of the magnified star images seems better in my TV 25 mm amplified 5X than in my UO 5 mm ortho eyepiece without the homemade barlow lens. I am sure this will benefit my planetary imaging. However, can anyone give me some advice as to how best to integrate the matched achromats for 1:1 relay. I suppose i can always order the archived issue of S&T, but I am sure someone out there has this issue or the informatin I need. thanks Rich
While this has provided the extended focal length I need, it also increases magnification x5. Not that I am complaining, the contrast of the magnified star images seems better in my TV 25 mm amplified 5X than in my UO 5 mm ortho eyepiece without the homemade barlow lens. I am sure this will benefit my planetary imaging. However, can anyone give me some advice as to how best to integrate the matched achromats for 1:1 relay. I suppose i can always order the archived issue of S&T, but I am sure someone out there has this issue or the informatin I need. thanks Rich
