Wednesday, March 6, 2013

Spring Crocus - Cerco 94mm Quartz Fluorite lens for reflected ultraviolet photography

Today about some early spring flowers, here Crocus (Crocus sp.) in reflected ultraviolet photography using my "work horse" UV filter, the Baader-U filter. Lens was a CERCO 94mm quartz fluorite lens. Light source was sunlight. All shots were done at about f5.6. So, on to the results now...

[click on image to see a larger one]

Visible light image:

UV image using Baader-U filter (approx. 320-395nm, effective peak approx. 375nm):

Simulated butterfly vision (UV - VIS) using XBV3 filter:

Simulated bee vision (UV - VIS) using XBV6 filter:

Quadtryptich of the above:

Crocus usually is reflecting only in long wave UV around 380nm, visible as a bluish violet and its center (anthers, stamen) is UV dark, which gets nicely visible here.

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

More info on this very interesting field may be found on my site