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Hi, I have an Olympus with pixel maping facility.

The handbook talks about performing this operation once a year, or so - but
I seem to be getting stuck (not hot) pixels on a very regular basis.

I map them out, and all is well for a short time, then it's more mapping,
etc.

Two questions: What's causing this repeated pixel failure?, and does pixel
mapping have any adverse effect on sharpness?

Thanks for your input