To start this year 2019, today tests shots in reflected ultraviolet photography of an Oncostele orchid with a modern German high speed ISCO f2/100mm movie projection lens. UV filter used was a Schott UG1 + BG38 filter stack as well as my work horse UV transmission filter, the Baader-U. All shots were done at f2 as this lens has no iris. Light source used was a modified Xenon flash.
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Schott UG1+BG38 filter stack:
This ISCO lens has despite its MC coating a surprising high UV transmission and I will certainly elaborate more on those type of 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