The Pentax Optio M40 is a newly-introduced "ultra-slim, sophisticated metallic body" point & shoot (P&S) that is a refresh of the Optio M30 – the new camera gets a few more pixels on a slightly larger sensor, a higher resolution monitor, stronger flash, slightly better shutter-lag response and a miniscule change in lens focal lengths. But the true test is not how the M40 stacks up against the M30, but rather how it does in an increasingly crowded (and capable) 7 and 8 megapixel compact digital field.

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