Originally posted by lol101
I have used 2 K10 and metering on both units was far from perfect.
On the one I presently use, I have to stick to a permanent +0.7EV adjustment and even with that it underexposes under bright light too.
By underexposing, I mean that the histogram is almost completely located in the lower 2/3 of the range with nothing in the upper 1/3.
Things get even worse when a reflection or strong highlight is present in the frame.
The K10 is kind of a fine camera (its IQ is really excellent up to ISO 400) but AF and exposure are no less than flaky. So it is K10 specific (all IMO obviously) since K20 and subsequent models don't seem to suffer from this problem.
That's the tone curve mostly, not the exposure.....
Pentax seems to use notoriously tight tone curves... especially in the "upper"
models. It's NOT a problem unless it is inconsistent from other K10's.... it is a philosophy or feature, take your pick....
Image from a review of the k7... and was a small jpg so bear with the "not so perfect" correction. Things work much better on full size jpg or better still RAW..... and converted to TIFF (8 or 16bit).
The first image is pretty spot on what a true "old fashioned" meter would do.
You didn't mention type of metering, which changes things as well.... spot and center weighted (dumb metering modes)would behave similar but Matrix (semi-dumb metering mode)is always a shot in the dark as to WHAT the camera was thinking.