Ed Jones ........... The best data is an interferogram, the best analysis is from an honest optician.
20 inch f8 Chief Ed Jones designed and a 17 f9 Zanbuto Wide Band Chief Mike Jones designed .Both unobstructed telescopes .
Here is the spot diagrams. I optimized it for C,F and D so the deep blue 405 isn't so good but it could be optimized for other ranges. With 5 lenses it there won't be too many ATMs that can do this but it shows what's possible. It works with most focal length mirrors that can have enough BFL space.
Quote:Mladen, I only have 10 surfaces, seems like it should work. I've played around with this design and it can be pushed even better including 405nm.