Saturday, August 1, 2015

San Francisco Science Museum - Color of Life Exhibit with Rudbeckia fulgida in reflected ultraviolet (UV) photography

Today about a new exhibit at the San Francisco Science Museum - Color of Life which has opened in June this year and which has some of my work in it. They included my Rudbeckia fulgida var. deamii outside shots in visible and ultraviolet light.

A glipse of the exhibit, located in several areas totalling an impressive 8.000sqft:
(C) California Science Museum

The Science Museum has chosen my work, as the petals of this R. fulgida exhibit a very prominent "bullseye" UV pattern, visible to bees and butterflies, but invisible to us humans.

Diptych of R. fulgida var deamii (left to right): Human vison, reflected UV:


This flower is reflecting UV strongly around 365nm at its petal tips (shown in yellow) with otherwise dark parts and hence creates a very distinct UV "bullseye pattern" nectar guide for its pollinators and all this gets nicely visible here.

If you find time to, pay it a visit, certainly worth going!!

I have written about this flower previously HERE
 
Stay tuned, more will follow on that fascinating subject...

European Starling - Sturnus vulgaris in reflected ultraviolet photography

Today shots of a well known, attractive bird, an European Starling - Sturnus vulgaris in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter. Lens was my UV-PL f2 62mm quartz flourite lens. Light source was a modified for high UV output Xenon flashlight. All shots were done at f8.

[click on image to see a larger one]

Diptych (left to right): Human vison, reflected UV (Baader-U filter):



This attractive bird has iridescent feathers with a metallic magenta shine around his throat, chest and back, which reflect at maximum under a 45 degree reflection angle, however it also reflects UV quite strongly, peaking at around 365nm (shown as yellow) and to a much lesser quantity around 385m (shown as purple), invisible to us humans (but made visible here using special photographic methods), and all this gets nicely visible.

Stay tuned, more will follow on that fascinating subject...