Monday, August 10, 2026

Common Sunflower - Helianthus annuus in reflected ultraviolet photography and simulated bee vision III

Today in my new location after the move more shots of a flower everybody has already seen, a common Sunflower - Helianthus annuus in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter. Lens was my UV-Nikkor 105mm quartz flourite lens. Light source was daylight through the windows plus some supporting 365nm UV LED light. All shots were done at f8.

[click on image to see a larger one]

Human vision:
 

Reflected UV:
 

This flower has a specific and unique UV pattern, its petal tops are brightly UV reflective around 365nm and the rest and its center is UV dark forming an UV bullseye pattern, and all this gets nicely visible here.

I have written about sunflowers before 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