Condensor vs diffusion heads
IMHO, cold light heads give smoother rendering of diffuse highlights, with more subtle variations of highlight details, as well as less contrast, less dust, less sharpness etc.
This has to do with the Callier Effect, where the transmission of light through the silver is not uniform with increasing density. Non-collimated light is not affected as much by the denser silver, for some reason I have yet to understand fully.
Check Fred Picker's book "Zone VI Workshop" for some A/B comparisons of the two types of light sources. (Saint)Ansel(mo) Adams used Cold Light heads for most of his later work.
You're correct, dancqu....it will NOT work as a diffuser. Unless of course you don't mind a big, fat hot-spot in the middle of your prints.
Last edited by stinkjet; 03-15-2005 at 08:39 AM. Click to view previous post history.