I am thinking to use DAS Gelatin as Large Format Film Emulsion. No need of silver copper or titanium oxide. I checked my Thorlabs catalog and UV lenses are 80mm to 500 mm focal length . price is 78 dollars. Sensivity is 185 to 2.1. Two lens groups Plano Convex or Meniscus.Diameter is 25.4mm.

What do you think about all .

Thank you

Mustafa Umut Sarac