Wednesday, October 24, 2018

[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