Yeah, Bjoern has some good stuff, and he is really smart and handy with photographic equipment. For anything worth your time, you really do need quartz optics (to get UV images within, say, the deeper parts of Aerochrome III 1443's UV sensitivitiy). I have done a lot of spectrophotometric work and you can fudge everything with plastics, borosilicates, or what have you, but the best results are with quartz. Of course, I had to be very picky with my work, but I do not want you spending a lot of time and money, only to cut one corner, and end up with sub par results. With Aerochrome III 1443, you can get very good UV sensitivity around 300 to 320 nm (basically the UVB range)...anything much less than that is going to be in the UVC range. If you are photographing high amounts of UVC reflectance from anything not the sun (that would be a UVC emitter, I know, and I know how the atmosphere filters much out, but that is beside the point), you better be wearing UVC goggles and have every centimeter of you skin covered if you do not want cataracts, skin burns, and possible skin cancer down the road. Anyone who has worked with germicidal lamps knows what I am talking about. Anyway, have fun with UV photography! I find it a bit harder to work with than IR photography, unless you are doing pinhole work (in which case IR photography is terrible).