"Walter Dnes (delete the 'z' to get my real address)"
<wzaltdnes RemoveThis @waltdnes.org> wrote in message
news:44f2c8dc$0$9832$c3e8da3@news.astraweb.com...
> Another low-light photography question... I assume that one setting
> of white-balance (sunny day, cloudy day, tungsten light, flourescent
> light, etc) attempts to collect all available light;
Correct, in the sense that they all use all the light that the sensor
capured.
> and that other settings result from reducing one or more portions of
> the visible spectrum. Is that assumption correct?
Not correct. The white balancing is a postprocessing operation, so
with appropriate software you can do the same after-the-fact. That
works best when shooting Raw images.
> Does "Cool" versus "Warm" setting make any difference?
Only on camera JPEGs (and thumbnails), and as a tag in the file data
which records the default setting for preview.
> And is there any setting that is generally the best
> light-collection,
> or does it vary greatly amongst different camera models?
For the best file quality, you need to use lens filters to bring your
results closer to how you want the result to look. That can generally
require longer exposure times, but that also gives lower noise
results.
--
Bart
>> Stay informed about: What "white-balance" has least light blockage? 
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