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woodsman
Pooh-Bah
Reged: 03/12/08
Posts: 1069
Loc: Colorado Springs, CO
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Re: Asking about the Biography of A. Jaegers
07/03/09 09:53 PM
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OK, I have all these refractors, and I have no idea how to test them or even collimate a refractor lens. Other than taking them to a lab, is there a simple way to test one?? I'd like to test my Sears 90mm. I guess I should have paid more attention to the postings from before, because I remember seeing something about a flourescent light test, but I don't know if that is for a refractor lens  , and one where you can check diffraction rings, but I'm pretty unsure what I need to do. Any suggestions guys? Thanks for any help, and happy 4th,  Rich
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artisticwoods
C-14 Orange Tube, C-8, C-5, C-90 Astro Model, C8 Schmidt Camera 8" f1.5, C5.5 Schmidt Camera f1.65, SPI 42mm f/19 Refractor, Sears 90mm f/15.56 Ref, Sears 80mm f/15 Ref, Swift 77mm f/13 Model 831, Scope 60mm f/11.7, Sears 50mm f/12
Unitron Model 140 75mm/1200mm, Unitron model 128 60mm/900mm
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