-philip doutreligne -ETX 90 -Orion Atlas mount -70/1300 coronagraph -Kutter catadioptric Schiefspiegler 200/4000 -102/1500 white light solar refractor http://users.telenet.be/philipdo
Quote:I experimented with this optical design a few years back. It did not work very well, mostly due to the insufficient quality and accuracy of these astigmatism correction spectacle lenses. Image quality at higher magnifications was rather poor compared to my classical catadioptric Kutter Schiefspiegler with plano-convex correction lens.
Ed Jones ........... The best data is an interferogram, the best analysis is from an honest optician.
A 60mm department store refractor started it all....
Quote:Spectical lenses are pretty much garbage if you try do do this. Off-the-shelf lenses are a much better option. Here is the Jolo.
-DannyMy warehouseMy Channel
Quote: but could make a Chief or a shief.
20 inch f8 Chief Ed Jones designed and a 17 f9 Zanbuto Wide Band Chief Mike Jones designed .Both unobstructed telescopes .
Quote:What lenses did you use?
Quote:There is a step by step paper on how to build this CHief Email me I will send it. Mike Did this work .And I have a CNC file on the top part . Dave paper should be in EDs book .EDs numbers tell me little of exactly the lens go . So much more info on there exact location .Any machine shop will understand Mikes coordinate system . The top box and primary mirror are set buy a laser and a target easy accurate
Quote: I think he gave up when Mike told him to.He said the top needed to be .003 and the truss carbon fiber .I knew this was wrong
Quote: but I make a hinged plate that can be adjusted to the angle between the lenses with an angle gage, a one time adjustment.