Originally posted by NeverSatisfied I noticed that with the K20D you can now adjust EV Comp in manual mode, which was formerly not available with the K10D. But what would be the purpose? Isn't it just as easy, if you're in manual, to adjust aperture, shutter speed, or ISO as needed? And what does the camera exactly do, if you adjust EV in manual- change ISO? It seems that you could probably use it to artificially boost ISO for extreme low-light use, but other than that, does anyone adjust EV in manual mode, and if so, why?
This is an extremely useful function for manual shooters, and is sadly missed on the K10D. My *istD allows for EV compensation also.
The use, for example if you deliberately want to have a specific under / over exposure, for many shots, and the light is changing, you don't want to continually check the metering, but just press for example the green button and set the exposure.
More to the point, on the K10D and K20D there are exposure errors with manual lenses and also when you attach teleconverters, because the viewing screen on these cameras specifically introduce an error in exposure that is a function of lens maximum apature, the camera reads lens apature directly through the TC and as a result, does not apply the correct compensation when the TC is attached. For my sigma 70-200 F2.8 this is a 1.3 stop error with a 2x TC.
Manual lenses have horribly non linear exposure on the K10D and K20D bodies, but if you are stopping down below FG5.6 you can accomodate for this by simply under exposing by about 1 stop.
On my *istD my M42 35mm F2 has a constant error of 1 stop (under exposing) and I simply add 1 stop with compensation ang don't have to worry about it again. Why should I have to think to that detail with every metered shot?