Originally posted by skaktuss Is there a way to set exposure compensation in manual mode (K100D)? I have a focusing screen, but I can't use it because pictures get underexposed 1-2 steps. In Av mode it wouldn't be a problem, but with M lenses in M mode I have to turn dial to compensate exposure. It's imposible to remember about turning every time after pushing AE-L button and it makes shooting much slower. I could use a bracketing, but thus I lose continuous and other shooting modes.
I looked in k100d's debug mode, bet even there I could not find how to calibrate EV. What would You suggest? I've read that many pentaxians use focussing screens without any problems.
This is a complicated issue, and is mainly concerned with the hardware more than the software.
If metering in Av mode is okay, which means in MF mode, the metering will also be the same when it is *wide opened* (try that!). As you start to stop down and do stop down metering, more underexposure will result from what you describe.
It is a hardware issue of mis-match of the focusing screen and the calibration of the light meter has not been properly made for smaller aperture stopped down metering. See:-
RiceHigh's Pentax Blog: When the Focusing Screen Lies (for Focusing and Metering)
So, even if there is a function of EV compensation in M mode (there is none as in M mode the EV button has no function), you have to vary the amount of +/- EV compensation according to the f-number set. All in all, this is very impractical and in fact you don't know what is the correct amount to be entered, too.
And, as to your problem, there is actually no solution, unless you can find a matching focusing screen with your K100D. My experience is that the original one on K100D is the most accurate combo amongst all Pentax DSLRs I have used for stopped down metering - D and DS always underexposed more when stopped down and the K10D usually overexposes when stopped down.