Originally posted by Ole When you remove your eye from the viewfinder, light may enter and affect the meter. Pentax usually includes a viewfinder cover with their cameras. I cannot speak for the K-x, though.
And I don't know if that's the cause, either, because I would have expected the LV photo to be darker not brighter in that case.
Actually this may well be the cause - don't forget in LV the mirror is flipped up so any light entering the rear eyepiece wouldn't have any effect -
Whereas on the regular optical viewfinder shot -
if I may hazard a guess -
since the K-x was mounted on a tripod -
after viewing, the photographer stepped back away from the camera to take the shot -
therefore removing the eye from the rear optical viewfinder -
allowing in extraneous light -
hence the darker exposure
as the K-x metering "thought" there was more light than the actual scene through the lens?
Perhaps to confirm - could cover the eye piece when taking the viewfinder shot - eg: cover with a piece of thick paper or cardboard, or put a towel over the camera body?