mughal@cornell.UUCP (04/09/84)
From: mughal (Khalid A. Mughal) Anybody know the difference between Skylight Filter 1A and 1B ? Any info will be appreciated. ~mughal@CORNELL
dmmartindale@watcgl.UUCP (Dave Martindale) (04/13/84)
Photographic film is sensitive to ultraviolet light which is not visible to the human eye. It will cause photographs of distant scenery to appear more hazy (and bluish, with colour film) than your eye saw. A UV filter removes much of the ultraviolet but has no effect on visible light. The 1A filter does this, and also removes a small amount of blue. The intent is to "reduce the excess bluishness of outdoor color scenes photographed in open shade under a clear, blue sky" [Kodak's filter databook]. I interpret this to mean that the filter is tuned for use with colour film outdoors. I don't know what a 1B filter is.