Neil Gould wrote:
[...] The main problem is that there has to be color content in order to adjust it! While many light sources "color" a scene by having spikes at one or more location in the color spectrum, they also emit light energy across much of the rest of the spectrum. So, filtering out the spike(s) leaves a more balanced scene because of the content in the rest of the spectrum. Light sources that only emit a narrow band of light will not provide significant illumination (if any) in the rest of the color spectrum, so there is nothing in the recorded image to adjust! making broad-based adjustments such as changing the overall color temperature will only result in filtering the light in the range of the illumination, so the image can take on a posterized look. Just as our minds can "fill in the blanks" when viewing a b/w image, the same happens under other monochromatic lighting conditions. I suspect that there are details that aren't recorded in the b/w version of your image as well, but the expectations may be different. Best regards, Neil Gould
Good Mornin' Neil! Never worry about a "late" reply .. .no such thing! The link worked for me, just a moment ago, so you may wish to try it, again. http://www.furnfeather.net/Temps/SagMill.htmYour note explains, much more clearly, exactly what I had suspected, once Etienne and Aram had pointed out the type and narrow spectrum of the light.
I can see your point about the b&w version... all the shapes will be there, but some of the shades of grey will still be wrong, because the narrow spectrum will cause some parts to be darker or lighter shades of grey than they would be if illuminated with a more broad spectrum lamp. But, because my memory is a coloured one, the shades of grey are still "acceptable", even if slightly in error.
It makes perfect sense. Thanks! :-) --- David Young, Logan Lake, CANADA Limited Edition Prints at: www.furnfeather.net Personal Web-site at: www.main.furnfeather.net Stock Photography at: http://tinyurl.com/2amll4 ------ Unsubscribe or change to/from Digest Mode at: http://www.lrflex.furnfeather.net/ Archives are at: //www.freelists.org/archives/leicareflex/