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help us grow.  Tell me more ×  I have read that longer exposure
times lead to increase/improved saturation and that landscape
photogs use ND filters to allow for longer exposures to get
better saturation.  Is this true and does this technique apply
to both film and digital. If true for digital, why? Surely, the
sensels receive the same number of photons for a particular EV
regardless of the time.  Also, is the quality of increased
saturation much different than what you would get from just
pumping up saturation in PS?  share|improve this question I was
always under the impression that, for film, slight under
exposure increased colour saturation. –  labnut Jan 20 '11 at
15:49 @labnut: Depends on whether you're talking about negatives
or chromes. Negatives like slight over-exposure; chromes like
slight under-exposure. Velvia kin