Originally posted by davea66 One thing I dont really get is the P Mode (Program Line)?
You can investigate P mode by observing how it reacts to alternating light. Eg. point the camera
gradually from a lamp towards the shade and watch the exposure change on the rear lcd.
Try it with auto ISO on and off.
You'll find that P mode places equal importance on shutter speed and aperture. It slows the shutter
speed and opens the aperture in equal proportions as light decreases, until it reaches wide open
aperture and a shutter speed that matches the focal length rule of thumb.
As light decreases further, P mode will increase the ISO until the ISO max limit.
As light decreases even further, P mode will show the shutter speed again.
By and large, P mode is a very reasonable exposure solution if you don't know in advance
if you want to spend your "exposure budget" on speed, DOF or noise.
Regards,
--Anders.