| Well for one thing, once you set any amount of EV comp, that adjustment remains until you physically reset it- even if you shut the camera off in between. I found that out the hard way yesterday at the park on an overcast day. I had +2 EV set (just messing around the night before), failed to notice, then wondered why I had to use ISO 800 to get a proper exposure. Took a minute to figure out.
The reason I suggested the ISO shift was because if you're in Tv or Av mode, that's all it does is adjust the opposite value (which is not always desirable). And so if you're in M where YOU set shutter and aperture specifically, what is there left for the camera to adjust?
Here's what the manual says:
"EV Compensation for M (Hyper-manual) and X (Flash X-sync speed)
For example, if the EV compensation value is set to +1.5 for M and X, an underexposure of 1.5 EV is displayed on the EV bar. if you set the exposure value so that the l is displayed at the center of the EV bar, the image will be captured with the compensated value."
The thing that confuses me is how they say setting a POSITIVE number for EV comp actually results in UNDER-exposure, and vice versa. But then I've heard people on this forum say that with certain lenses they always dial in +.3 or +.7 EV comp due to a tendency of the camera to underexpose. Aren't these two ideas in conflict with each other? Or does Pentax just not know how to explain it? |