Today a Rudbeckia fulgida flower portrait (with an invited guest) in simulated tetrachromatic vision (i.e. UV=blue, BLue, Green, Red) like birds or butterflies have.
[click on image to see a larger one]
For comparison, this is the normal, human vision version (i.e. Blue, Green, Red):
I found it especially interesting how strongly the flower center reflects UV (blue center dot) and how prominent that te "helicopter landing platform" is formed as white tips of the yellow flower petals.
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