This is driving me nuts. I have one lens that I can't nail focus for all the tea in China and most shots are either front or back focused depending on the lens. I know the lens is super sharp, I just can't seem to get the subject in focus. If it is sharp in the viewfinder, it is off in the file. Conversely, there are some shots that I knew I missed the focus, but the file is critically sharp. I notice this mostly with a 180/2.8, but also (though to a lesser degree) with a 90/2. Is this a screen issue, a viewfinder issue or just user error. I'm running a M screen on a A900.
Perhaps my eyes just aren't that good and I need to give up and switch to autofocus.
Any help is appreciated.