Well, spring finally seem to have arrived in Weinheim where I live, so here a few shots of some first spring flowers, like that Eranthis hyemalis - Winter Aconite.. Shots were done aside from visible photography in reflected ultraviolet using Baader-U filter and in simulated bee vision using my XBV6 filter. Lens used was an older f3.2 / 80mm Quartz Fluorite lens. Light source was sun. All shots were done at approx. f8.
[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 image using experimental XBV filter:
Winter Aconite has a prominent UV pattern, its center (anthers, stamen) is UV dark, and the petal ground seems to have some highly reflecting spots radially centered around the stamen. This older quartz fluorite lens is reproducing this quite well and all that gets nicely visible.
Stay tuned, more will follow on that fascinating subject...