Our 6mm focal length Model 214 and 9mm focal length Model 286 non browning lenses have been designed to deliver high image resolution (f2) and minimal geometric distortion from 400 – 750 nm. Manufactured to the highest quality standards from Cerium doped glass, Model 214 and 286 lenses are able to withstand radiation exposure of up to 100 kGy (100,000,000 rads) and temperatures up to 55 degrees centigrade without discoloration. 

Learn More: https://www.resolveoptics.com/non-browning-lenses/