I looked in to the prices of 250 mm Soviet lenses and Kiev 88-60 prices and I need a miracle to buy them. I decided to have a go to photon sieve telescope lenses a go and I found papers about them. I can design a lens , tube and box and coat my emulsion or use ortho film to filter the high dispersion light coming from photon sieve.
Do ortho films really very narrow band emulsions or do bw papers are narrower. If they cover large band , is there a extremelly cheap to make tight tolerance emulsion for paper negatives ?
Thank you for reading,
Umut
Do ortho films really very narrow band emulsions or do bw papers are narrower. If they cover large band , is there a extremelly cheap to make tight tolerance emulsion for paper negatives ?
Thank you for reading,
Umut