I have been told that UV photography could be done using pinholes. Now let's try that out and see if the results could be compared to the ones using special lenses....
The following two shots were done in darkness using no special filter and my Nichia 365nm UV Led lamp/flash for the UV exposure and tungsten cold light for the visible shot. I used a laser drilled very fine brass pinhole with about f180. Camera was a Nikon D70. Visible image first, unadjusted except for size, exposure about 1/6 sec @ ISO400:
Now the UV image, exposure about 4sec @ ISO400:
So and the conclusion? No pinhole for UV, at least not for my work which needs to resolve very fine details. Artistic landscape work might be a different, maybe possible area, though.
Stay tuned, more will follow on that fascinating subject...
More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos