My solar projector has been the best solar projector on the market but there may be no more. I have used up all the optical windows used to make the lenses and mirrors and unless I can find an alternate source of optics my solar projectors are about to become collectors items.
A little history on these projectors. Back in the late 80s when I was working for US Precision Lens they were taking apart a TV projection lens and getting rid of a nice lens cell which I acquired. About the same time they were scrapping the optics for a mirror telephoto which had a nice 4.25 inch optical window. I edged some down to fit the lens cells and ground a nice long radius on them. I took them home and polished them on a LP66 lap on a polishing machine. At first I used 3.1 inch secondary mirrors from Coulter but later aluminized the windows.
I got a lot of compliments on the projector after the eclipse. I went to Tennessee to take these pictures.