When I believe that I'm focused on an image using either the ground glass on an alpa 12 stc or using a laser distometer I make an image and if I zoom to 100% on review or if I try to focus using live view, the images seem soft in the 100% crop view. Am I asking for too much out of the screen or should I be able to see a tack sharp image cropped to 100% on the screen on the back? I'm so used to using LF cameras, I don't have a lot of confidence in my new gear.
However many or few pixels you have, it should look sharp at 100% on the screen... is this a digiback screen problem? does it look sharp at 100% on the computer screen?
I had this problem on my Silvestri sliding back... but using live view focusing should be spot on - how can it not be if you are focusing with the actual sensor and not a viewfinder/ground glass system?
Do the images look sharp anywhere anyhow?
Do you use digital lenses?
Does this happen with different lenses?
Has the lens been dropped?
Take several shots at different focus settings as if for DoF merge... photograph a carpet, brick obliquely etc...