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