Bart, thank you for the quick reply. The spec sheet says 254-nm and it is high intensity. I'm somewhat concern about the possibility of "bleaching the Bayer CFA." Do you think a UV filter would help? I'm also thinking that I might use my Sony rather than my Phase One in case I fry it.
Weldon, do they specify what "high intensity" is, and anything about an emitted spectrum? I'd not be too worried if the glass of the lens stopped all wavelengths anyway. To shoot an image with 254 nm would probably require Quartz lenses or something like that, because normal optical glass absorbs a lot of short UV wavelengths (so the more lens elements the more absorption in the lens).
And consider if you actually need to shoot the UV exposure itself (it will probably look rather blue with some red mixed in
if the wavelengths are long/strong enough to make it through the lens), maybe you can simulate it (unless they are looking for some change in the subject matter while it's being exposed)? Maybe it's possible for them to measure the spectum of the transmitted light through your lens?
Maybe a UV filter is just too effective, depending on what needs to be recorded, but if there is some longer wave UV emitted as well, and it's of high enough intensity/long enough exposure time, there might eventually be some bleaching of the CFA dyes. Try calculating (if you can find the details of) the expected exposure level, and compare that to a couple of 100,000 exposures of normal outdoor UV levels, to get an idea of the risk, if any.
Here are some chart of some transmission spectra of regular glass (optical glass may have a bit more transmission than regular glass):
The thicker the glass is, and the more layers there are, the less UV exposure there will be (for an actual image and for damage).
If the UV is supposed to provide for an actual exposure of an image, and there is enough of it, also consider that it will require a different focus position (behind the subject).
Cheers,
Bart
