Originally posted by IsaacSteiner I have a question.
When I use either of my Pentax-M lenses (50mm F2 / 28mm F2.8) I find the photos to be over exposed. But since I shoot RAW I can fix it quite easily, but it'd be nice to have it almost perfect before hand.
So before I shoot, I set the aperture I want, then I click the green button, then focus, and shoot.
Any suggestions?
Thanks,
-Isaac
Isaac, I have found with my two M lenses that there are a series of stops that do give correct exposure readings. I tested and found also, that the mechanical exposure linkages provide consistent exposure. Thus, I conclude that metering is the problem. In the digital SLR there is no tracer for the aperture setting, and this seems to give the meter indigestion at some of the apertures.
I use the stop down preview method to set my exposure rather than the green button method. With both my lenses f/8 gives me a correct exposure reading (as long as I pay attention to what I am metering, of course) and I then interpolate from there.
Both my lenses are a bit slow so I cannot speak to what apertures will give correct exposure in your case. I suggest you take your lens and either play with the metering or use sunny 16 on an average scene to find which of your lens' apertures are accurate.
EDIT: Re message immediately above about using Tv. The camera is allowing you to set the shutter speed, but will not change the aperture in this instance. In both Av and Tv, the camera will only shoot with the lens wide open, no matter what stop you set on the aperture ring.