[click on image to see a larger one]
Visual shot:

Simulated bee vision using XBV2 filter:

Simulated bee vision using XBV6 filter:

Simulated bee vision using XNUV filter:

UV using Baader-U filter:

And here a polyptych of them all:

The new filtering technique makes the very prominent UV reflectance of the petals clearly visible.
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