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UV/IR Thermal or Xray Photography Humans happen to use visible light naturally but now we can go beyond the usual wavelengths we appreciate, to find out more about our world and ourselves.

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Old August 12th, 2012, 11:51 AM
Dr Klaus Schmitt Dr Klaus Schmitt is offline
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Default Rudbeckia fulgida var deamii in visible and UV light

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.
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https://www.flickr.com/photos/kds315/ my normal photographic work
http://photographyoftheinvisibleworld.blogspot.com/ my ultraviolet (UV) work
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Old August 13th, 2012, 08:22 AM
Asher Kelman Asher Kelman is offline
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Klaus,

An idea just came to me. Birds have ability to respond to UV. It could be that insects that might damage plants would be more visible against the bright background and enable passing birds to pick them off! We assume that birds wouldn't go for there bees!

Asher
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