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Usefulness of AutoGain feature on Multiple Exposure??

elec164

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"RE: Usefulness of AutoGain feature on Multiple Exposure??"

elec164 Silver Member Nikonian since 15th Jan 2009
Thu 17-Jan-13 06:33 PM

>Two or three underexposed (intentionally) images, each having little noise. But adding
>up to correctly exposed, and noiseless single image.

I don't believe that's necessarily so.

There are two types of noise, fixed pattern and random. Shot noise is random and best dealt with through blended multiple exposures. But while several underexposed images might improve shot noise, I believe it will make fixed pattern noise such as read noise more apparent.

So in that sense it won't be noiseless, but instead random noise will be improved while fixed pattern noise will be worsened.

At least I think I got that correct.

Pete

Pete

Visit my Nikonians gallery.

A general, generic topic Usefulness of AutoGain feature on Multiple Exposure?? [View all] , Bravozulu , Tue 15-Jan-13 06:29 PM
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