UV lights

Questions, comments and suggestions regarding Phase One P+ series and P series digital camera backs.

UV lights

Postby Eric Joakim » Mon Nov 22, 2004 11:59 am

Does anybody have experience shooting with a Phase One back under UV lights? We want to reproduce the 'flourescent' effect you get on whites under UV lamps.
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Postby damienlovegrove » Tue Nov 23, 2004 9:33 pm

You can do a simulation quite easily in Photoshop using the diffused glow function. It boosts contrast and causes highlight scattering without affecting the shadow detail. It doesn't render underwear more noticeable like the real thing however.
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UV Imaging

Postby alexray1 » Thu Nov 25, 2004 11:11 am

ejo, i assume you do mean UV and not IR. If so, do you need to photograph UV flourescence or UV illumination? There is a big diffference in method.
UV fluorescence is relativly easy as you are imaging in the normal visible range.
Using UV for illumination, as in medical imaging of the skin etc is a tougher prospect. Finding a lens that transmits a decent amount of UV is difficult these days!

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UV

Postby damienlovegrove » Thu Nov 25, 2004 8:44 pm

At the BBC we used to use Lenses made of Quartz to shoot in 'black light' UV. Optex in London had all the kit. This is the kind of thing we used:

http://www.ukaoptics.com/uvquartz.html

CCD's are sensitive to both UV and IR but as Alex pointed out glass absorbs UV. If you can see the effect you are after with the human eye you can record it on a CCD camera without problem.
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