Today close-ups about another early spring flower I have written about before, Marsh marigold (Caltha palustris) in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter as well as my XBV filters for simulating butterfly and bee vision. Lens was a CERCO 94mm quartz fluorite lens. Light source was sunlight. All shots were done at about f5.6.
[click on image to see a larger one]
Visible light image:
UV image using Baader-U filter (approx. 320-395nm, effective peak approx. 375nm):
Simulated bee vision (UV - VIS) using XBV6 filter:
Simulated bee vision (UV - VIS) using XBV5 filter:
Quadriptych of the above:
This Caltha flower has quite a prominent UV pattern, its center is UV dark, as well as some UV dark veins on its petals and this gets quite nicely visible.
More about this flower 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