The Kuribayashi Petri Orikkor 35mm f/3.5 with M42 mount transmits UV down to 325nm,
which is deeper UV transmission than any Nikkor lens, short of the UV-Nikkor costing much more, and slightly deeper UV transmission than a Noflexar 35mm lens.
The M42 mount can be converted easily. My inexpensive M42-to-Nikon converter with built in corrective infinity focus lens (which you will not need with many cameras) has no effect on the UV transmission or depth.
This lens has miniscule to no focal shift, and comes in other versions, such as the W.Acall Kyoei 35mm f/3.5 (and other Kyoei clones).
Some examples of Kyoei/Kuri clones:
http://www.savazzi.n...phy/35mmuv.html
http://myphotojourne...mm-f3-5-lenses/
If you shoot UV, and don't want to spend $1,000.00's on a UV lens, then try to find one of these.
This is old news, but I am posting it here because things can disappear on other sites sometimes.
1) Kuribayashi lens.
2) Sparticle bandpass filter holder transmission test of Kuri 35mm with Baader U filter on lens.
3) Barn shot with Kuri 35mm and Baader U filter (320-400nm).
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Ultraviolet Photography
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