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Nobody seemed to know whether this might work so I thought I'd try it. It didn't work out too well. I used and 13mm Ethos and a 50mm F1.8 lens. The blue colour fringing was terrible. Worse than a cheap set of binos. The only thing I can think is that the Ethos is designed to go down to about F4 or F3 with a Paracorr. A 21mm Ethos with a 50mm lens stopped down to F2.8 might perform better. Actually, I haven't tried stopping down the lens to see if that helps. It might help the aberrations, and diagnose the problem, but it would ruin the exit pupil which would kind of defeat the purpose.
I have been told that camera lenses and telescopes were designed with different purposes in mind and that this idea is unlikely to work anyway. Perhaps I may need to try this with a small telescope made up of small surplus lenses rather than a camera lens. Still haven't given up on the idea as yet.
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