Largobob wrote:
I'm a bit confused. (OK....Not the first time.). I know that various colors of light are transmitted, or attenuated (reduced) when passed through a colored filter. I also know that panchromatic (B&W) film has variable sensitivity to various colors of light. i.e.: Pan-X was most sensitive to blue light...thus a blue sky looked washed-out (overexposed). Using a yellow (for a more normal sky) or red (for dramatic sky) filter to hold back some of the blue, made for very pleasing results. My confusion is not knowing whether the sensors in a modern DSLR are more or less sensitive to various colors. I'm guessing they have a fairly flat sensitivity across the visible color spectrum. That being the case....I'm guessing using a colored filter on a DSLR will give a general color cast over the entire frame, rather than providing the same kind of effect that one would produce with film???? Now, filters can be used to selectively reduce glare (polarizers), reduce haze, cut UV, provide neutral density, etc.....all of which can be useful to DSLR imaging.
I'm a bit confused. (OK....Not the first time.). ... (
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When viewed in color, the filter provides a color cast to the entire frame. When the color cast frame is converted to monochrome, it is similar to the effect of shooting black and white film with a color filter.