I often have odds and ends for sale listed her                                                    I have a few solar projector projector lenses to sell $150.  These give an 8+ inch solar image with a 70 to 80 foot focal length.  You can use a Newtonian diagonal for the flat.  I

New Listings

Coronado PST Ha trlescope This was one of the scopes with the bad energy rejection coatings so I seperated the doubled, polished off the bad coating, recemented ir, then put a separate energy rejection filter in it. $350.

Large solar projector This has a 7 inch lens and give a roughly 12 solar image. The focal is quite long, over 100 feet. $400

8 inch F/12 Chief This one needs the primary recoated. I stripped it but stil needs re-coated. contact me for more info.

4 inch Zygo Interferometer This is a refurbished Zygo GH laser interferometer. It’s the first model made by Zygo which originally had a Polaroid camera which I’ve converted to use a digital camera (not included) but most any digital camera will work.  It’s not one of the later computerized versions with phase shift image processing but it does take interferograms which you can use with DFTfringe or other freeware programs for image analysis.  Transmission lenses could be bought from Zygo but are quite expensive and are not included but I hope to have a transmission null lens available or you could get a Ceravolo null lens for it for testing parabolic and conic mirrors as a modified Offner test.  It is in working order and this is an Igram of an optic taken with it.

 Realize you would need at least a short optical bench with this and a motorized mirror stand to make it practical but most any size mirror could be tested with it.

Pick up only.