OK...here goes. I recently purch. a Celes.N8. The few times I've had sky to use it, it's wowed me.!! My telescope making question is this. Where can I find good info for designing some sort of refractor.? I have saved for years a selection of lenses from 2" to at least 6". They all seem to be coated. Some are convex & some are concave. The 'parabola' varies. They're remnants from copy machine dis-assemblies.(very large,very expens. copy machines) Should I just slide them around on a table top or can I actually find some sort of criteria for getting me in the ball-park.?(focal length,EP's, etc)
Maybe this is a waste of time too. They sure seem to be nice quality optis though.
Maybe this is a waste of time too. They sure seem to be nice quality optis though.
