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8" f5 Refractor Lens Respacing

Started by tomrod, 09/14/2002 10:01AM
Posted 09/14/2002 10:01AM Opening Post
I have a 8" f5 four element refractor. I believe it is a Petzval design. It was used in an aero spy camera in the 70's. I have done a quick test and it has quite a bit of color. It came with a minus blue filter so I believe that it is optimized for a wavelength that cuts through haze outside the visual range.

I hope that it can be respaced to move the correction into the visual range. It will probably be quite an undertaking, but I think it would be worth it. Does anyone know how to accomplish this task, or where I might get useful information?

I also have a 6" triplet with the same problem.

There are only 10 kinds of people who understand binary - those that do and those that don't