[UV, VIS, IR] Lyman Alpha deep UV lenses V - Oncostele orchid

Today shots of a Orchid hybride (Oncostele Wildcat 'Golden Red Star') in reflected ultraviolet photography with a NYE OPTICAL Lyman-Alpha I f2.8/100mm UV-VIS-NIR lens. UV filters used was the Baader-U filter for the Lyman Alpha 100mm, rear mounted. All shots were done at f2.8 as the Lyman Alpha lens has no iris. Light source used was two different Nichia 365nm UV-LEDs, one a cheap Convoy S2 UV mini torch.

[click on image to see a larger one]

For reference, visible light shot (UV-Nikkor 105mm):
 

Lyman Alpha I lens UV using Baader-U filter and Convoy S2 UV LED:
 

Lyman Alpha I lens UV using Baader-U filter and Convoy S2 UV LED:
 

Lyman Alpha I lens UV using Baader-U filter and strong Nichia UV LED:
 

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 with this Lyman Alpha I f2.8/200mm mirror only lens.

I have written about the Nye Lyman-Alpha lenses previously HERE and about this Orchid HERE
 
Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

[UV, VIS, IR] Lyman Alpha deep UV lenses III

Today tests shots in reflected ultraviolet photography with a NYE OPTICAL Lyman-Alpha I f2.8/200mm UV-VIS-NIR lens. UV filter used was my work horse UV transmission filter, the Baader-U, rear mounted. All shots were done at f2.8 as this lens has no iris. Light source used was daylight at a dull and rainy day.

[click on image to see a larger one]

Roof detail approx. 30ft/10m away:
 

Window detail approx. 30ft/10m away:
 

Absence of CA, easily seen on the stainless steel exhaust tubes approx. 60ft/20m away:
 

Closeup shot of an African Violet, approx. 3ft/1m away, using Nichia UV LED (365nm):
 

This lens has a UV transmission in the 190-400nm range of 85-88% and a resolution of 25lpm at infinity and 60lpm at 300mm distance and covers full format (maker data).The test images certainly confirm its usefulness.

I have written about the Nye Lyman-Alpha lenses previously HERE
 
Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos