Mike,twice I have accidentally turned down the exposure/compensation setting down to zero.It is usally kept at 0ne third of a stop down.My own fault as I never check histograms etc.All the images came out so dark.But I did manage to rescue several each time using Picasa.The last time it happened I had been photographing the local mink in the river.The first time I have actually seen them,I took over 100 shots.Not a mistake I will make again-hopefully not.
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