Monday, December 31, 2018

Oncostele Wildcat 'Golden Red Star' in visible, reflected UV, simulated bee and butterfly vision - differentials

Today shots of an Orchid hybride, Oncostele Wildcat 'Golden Red Star' in reflected ultraviolet photography as well as simulated bee and butterfly vision  - but also in differential ("psychedelic") presentation. UV filter used was the Baader-U filter, my "work horse" filter for reflected UV as well as my proprietary XBV filters. All shots were done at f8 using an UV-Nikkor f4.5/105mm lens. Light source used was a modified for high UV output Xenon flash.

[click on image to see a larger one]

Human Vision (VIS):

Reflected UV (Baader-U):

Simulated Butterfly Vision:

Simulated Bee Vision:

Human Vision (VIS) - Ultraviolet (UV) Differential:

Simulated Butterfly Vision (BU) - Ultraviolet (UV) Differential:

Simulated Bee Vision (Bee) - Ultraviolet (UV) Differential:

This orchid has a very specific UV pattern, its petals are very UV dark, but its lower petal lip has on the lower center a very UV bright spot as well as on its center "nose" formation an UV reflecting spot and all this gets nicely visible, also in Differential form (UV reflection shows as light blue)

I have written more about this orchid HERE and about Differentials HERE

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

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