#16. "RE: Usefulness of AutoGain feature on Multiple Exposure??" In response to In response to 15
Pete, I believe you have the theory correct, but the question -- and I think this is what Brian is driving at -- is whether the SNR will be reduced more by taking three high-ISO shots and merging them compared to taking one low-ISO shot, albeit at a longer exposure. Either way, you have to consider motion effects. Either way, you'll improve the SNR. I think the jury is out as to which way would be better, but I'm with Brian in thinking you probably won't gain that much with the multiple-exposure technique.