Photography in the Ultraviolet spectrum

Photography in the Ultraviolet spectrum: "fact that glass is NOT opaque to UV in the A and B near-UV bands, but does start attenuating UV-B significantly by 330nm, I think. You can be much more specific by specifying what kinds of glass, etc., for example, flint glass would attenuate more at higher wave lengths, I think, than crown glass, and there are many glass formulations that are different from those in use in today's lenses. Also, the modern coatings, especially on zoom lenses, tend to attenuate UV, so look for simpler 4-5 element prime lenses with minimal coating to photo in UV."