>Ok, I have no idea what I am doing wrong. I shoot in either M >or AP and after getting the exposure correct I focus on the >eyes of my subject. The little green light shows up solid in >my viewfinder and "my" camera tells me I am in >focus. Later when I look at the photos, even though it is >mostly focused, I am unable to actually find that sweet spot. >The images are just not as sharp as I want them to be. Can >anyone give me any advice or suggestions on how to find that >sweet spot of my lens? > >I usually shoot with a 24-70 2.8 lens at f7.1 to f8.
Well, f/8-ish should be giving you lots of depth of field, so that is probably not the problem.
However, at f/8 if indoors then your shutter speeds could be low enough to start worrying about motion blur, both camera and subject.
Another aspect is your post-processing settings regarding sharpening.
It is highly doubtful that the problem is related to any sweet spot of the lens. Can you post an example or two, unedited with all the EXIF data intact? That way we will see what you are seeing.
---------+---------+---------+---------+---------+ Joseph K Seattle, WA, USA