Dr Klaus Schmitt
Well-known member
Today about another attractive flower, for humans as well as bees: Rudbeckia fulgida var. deamii. Shot outside with natural light (blue sky, no direct sun) in visible and ultraviolet light, using the Baader-U UV pass filter, a CERCO 94mm quartz flourite lens and my UV sensitive camera.
Visible light image:
Ultraviolet (UV) light image:
Diptych VIS - UV:
The petals of this R. deamii variant shows a very distinct "bullseye" UV pattern, invisible for us humans, as many other Rudbeckia species do. Also this one is reflecting around 365nm at its petal tips and is creating a very distinct UV nectar guide for its pollinators.
Visible light image:
Ultraviolet (UV) light image:
Diptych VIS - UV:
The petals of this R. deamii variant shows a very distinct "bullseye" UV pattern, invisible for us humans, as many other Rudbeckia species do. Also this one is reflecting around 365nm at its petal tips and is creating a very distinct UV nectar guide for its pollinators.