ZDFzeit August 25 20:15h CET - UV videography to show the effect of sun protection II

The ZDF had contracted me and my UV cameras to contribute to their series ZDFzeit. This episode has been aired on August 25, 2015 at primetime 20:15 hours CET and has shown the effect of dangerous UV radiation on human skin and the importance of using proper suncreme to protect against that.


Here now is the video, Suncreme + UV starts at 7:30m [click]:

Quite impressive results have been obtained, aside from it having been a great experience to work with such a great team of the ZDF. It is well worth watching to see what a human sees and how that same scene looks like in ultraviolet (UV) light!

I have written about that before HERE

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

ZDFzeit August 25 20:15h CET - UV videography to show the effect of sun protection

The ZDF has contracted me and my UV cameras to contribute to their series ZDFzeit which will now be aired on August 25, 2015 at primetime 20:15 hours CET showing the effect of dangerous UV radiation on human skin and the effect of using proper suncreme to protect against that (in German language, with subtitles).

[click on image to see a larger one]

(C) ZDF, used with permission

Here is a LINK to the official announcement.


Quite impressive and graphic results have been obtained, worth watching to see what a human sees and how that same scene looks like in ultraviolet (UV) light!


There is a part II about it showing the video HERE

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

Using sunlight or shadow in reflected ultraviolet photography

Today shots of a R. fulgida flower, but is about some principle observations when doing reflected ultraviolet photography in sun or shadow. I was using my "work horse" UV filter, the Baader-U filter. Lens was my CERCO 94mm quartz flourite lens. Light source was sunlight resp. shadow / blue sky at around 1800 hours (early evening). All shots were done at about f5.6.

[click on image to see a larger one]

Visible light image - Sunlight  

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

Visible light image - Shadow  

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

Quadriptych of the above images for comparison:  

Quadriptych of the above images for comparison (detail):  


I had the rare chance to find about identically looking R. fulgida flowers just a few centimeters apart, one in sunlight and one in shadow, when I noticed how different the UV results looked like. Comparing the images taken in sunlight or in shadow (blue sky being the only UV source), the latter UV image shows much clearer details and more even exposure. It comes at a steep difference however, 2.5EV (stops) more the shadow image took.


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

[UV] Sunlight vs Nichia 365nm UV LED - colors

A quick experiment using the same preset WhiteBalance using my ReflectionDisc.

UV sensitive camera, Baader-U filter, ReflectionDisc for in-camera WB

[click on image to see a larger one]

Left: Nichia 365nm UV LED; Right: Sunlight:



Interesting to note, that the WB still holds and the proof for the wavelength "used" is in the middle (frosted glass on my balcony) - just compare the colors with the "UV color palette" I have pasted on top.


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