Hi everyone- I've been noticing a grey dot appearing in my pictures lately. It's always in the same spot, and seems to happen at smaller apertures. I've posted some pics for examples, yes I know the metering/exposure is off, etc. but they happen to illustrate what I'm talking about. The spot is in the upper left section of each shot. I used the 14-42 kit lens on these shots, looking through it unmounted I can't see anything obvious like dust, blobs, etc. Thanks for looking!