G1X, UV filter instead of lens cap?
How would a sensor be exposed when off? Keeping a shutter open when a camera is off is a major design flaw. Or did I not understand your question correctly?-- hide signature --
For some reason I remember hearing stories of uncapped lenses harming the insides of certain cameras when left out for too long. I guess common sense would suggest that any sensor that didn't immediately conceal itself would wear out pretty quickly. Just wanted to be safe.