Today shots of a flower bouquet in reflected ultraviolet photography as well as simulated bee and butterfly vision using a f3.2 / 81mm Quartz Fluoride Condensor lens from an older UV-VIS spectrometer system. A variable aperture was added to the Quartz Fluoride Condensor lens to allow stopping down. UV filter used was the Baader-U filter, my "work horse" filter for reflected UV as well as my proprietary XBV filters for simulated bee and butterfly vision. All shots were done at approx. f5.6. Light source used was a modified for high UV output Xenon flash.
[click on image to see a larger one]
Human Vision (VIS):
Reflected UV (Baader-U):
Simulated Butterfly Vision:
Simulated Bee Vision:
Quadriptych of VIS, UV, sim. Butterfly and Bee vision (left to right, top to bottom):
This bouquet of flowers has mainly yellow and orange roses in it, which hardly have any UV reflection, but those white Camilla flowers do have long wave (around 385nm) UV reflection and all this gets nicely visible, also in simulated Bee and Butterfly vision, on both used lenses.
This older Quartz Fluoride Condensor lens does rather well in UV, but it only covers mft sensor format, possibly APS-C (with another modification).
I have written more about that old quartz fluoride condensor lens HERE.
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