QSI RS8.2 - First Light in Discussions - Cameras Posted January 2, 2015 As an addendum to my last post, the fused quartz window should be a lot stronger than the standard window. Also fused quartz if properly heat treated, i.e. cooled down slowly to stress relieve internally, will transmit ultraviolet light probably below 200nm without affecting polarisation of the light.DerekGood to know! I've been considering some UV work for planetary imaging. It seems Venus starts showing some decent details at these wavelengths, but I'd really need to move up to bigger diameters/longer focal lengths to get the resolution.This comes back to your previous point about sensor size, there is always some compromise to be made! However I'm still satisfied with my choice and the camera performs great, I just wish there was a few more clear nights!