[UV] A surprising lens without UV focus shift II

Here a few more tests using Sanvitalia procumbens as a target and these surprising lenses showing no / hardly any focus shift for reflected UV photography.

[click on image to see a larger one]

35mm lens, no focus shift 

visible light shot: 


UV shot (using Baader U-filter and Xenon flash): 

Here tests shots from the same lens maker, but f=85mm with some 0.5mm focus shift:

visible light shot: 



UV shot (using Baader U-filter and Xenon flash): 


There seems to be a family of these lenses having high UV transmission, I have identified three by now, but only one has nearly no focus shift. Have a look at the high UV transmissions these lenses have:

pink: Noflexar 35mm lens, magenta: that newly found 35mm lens:



and here the group of these three newly identified lenses: 



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