I often use and like larger depths of field, like f8 in manual mode.
I really love my K5, and am gradually learning the nuances of operating it. But one thing was starting to bug me. When i'm in Manual exposure mode, and push the green button to establish a starting point for exposure adjustment, the camera would reset the aperture down to f2.8. So i tried pushing iso to 3200, and push the green button, same thing - f2.8 would be restored, even if it was sitting at a smaller aperture.
Then i tried adjusting program line (in the shooting mode, page 3) to every available option, setting M mode and seeing what the green button would restore the base shooting parameters to.
F4 on a DA35 f2.8 lens, was the smallest my MTF program line would adjust the camera to
F4 on a Tamy 28-75 f2.8 lens, was the smallest my MTF program line would adjust to when the green button is tapped in M mode.
What am i doing wrong, is there no program line mode that will reset Manual settings to higher than f4.0? MTF mystifies me since many lenses are sharper when stopped down a "1 or 2 stops" is the common phrase. Why then on the MTF program line, won't it set exposure aperture in manual mode higher than f4?
The old photo journalism adage of "F8 and be there" is something Pentax engineers should have thought about when programming the camera. Unless i've overlooked something - a possibility that can't be discounted
Postscript 1: Much of the above is wrong. The explanation is that the program line adjusts according to metering and iso setting. With appropriate settings of iso, i'm now able to indoors get up to a green button F11 aperture by setting 12,800 iso and spot metering a window inside.
Last edited by philbaum; 04-29-2011 at 01:09 PM.