Oncostele orchid in visible, reflected UV, UV-Nikkor vs Quartz Fluoride lens - psychedelic

I have done shots of an Orchid hybride, Oncostele Wildcat 'Golden Red Star' in reflected ultraviolet photography using an UV-Nikkor f4.5 / 105mm lens in comparison to an older f3.2 / 81mm Quartz Fluoride Condensor lens from an older UV-VIS spectrometer system before here. UV filter used was the Baader-U filter, my "work horse" filter for reflected UV. All shots were done at approx. f8. Light source used was a modified for high UV output Xenon flash.

Now today I'd like to show differential of those VIS and UV images, making strinkingly visible the difference, hence why I call those images "psychedelic"....

[click on image to see a larger one]

UV-Nikkor 105mm Lens: 

Human Vision (VIS):
 

Reflected UV (Baader-U):
 

Psychedelic (Differential VIS-UV):
 


Quartz Fluoride Condensor Lens 81mm: 

Human Vision (VIS):
 

Reflected UV (Baader-U):
 


Psychedelic (Differential VIS-UV):
 

This orchid has a very specific UV pattern, its petals are very UV dark, but its lower petal lip has on the lower center a very UV bright spot as well as on its center "nose" formation an UV reflecting spot and all this gets nicely visible, also in this psychedelic differential presentation, on both used lenses.

I have written more about this orchid HERE  and more about that old quartz fluoride condensor lens HERE.

More such psychedelic differential images may be see 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