Hello ,

I would like to find out one information about Zeiss plano sun lenses in CR-39 material. I'm wondering what is the exact radius curvature of Zeiss CR-39 plano sun lenses in 6 base curvature. I know the mathematical formula for calculating radiuses, but i realize that each lens manufacturer has different true front curve values based on which the radius curvature is calculated. If someone has their catalogue i believe this info is marked there. Unfortunatelly, i can't find their catalogue anywhere on the net.

Thank you very much and best regards,