Reply to Old canon DSLRs -Photos never 100% sharp

tourtrophy:

Focus is on the spot, no question there.

Let me reformulate the question. I’m shooting with 5dIII and sigma 35mm which is a very sharp lens. I stop it to f8, and manually focus at infinity. The camera is on the tripod, so no motion blur there.

When I pixel peep that photo at full size, why it isn’t 100% sharp even in the center? Why does a detailed object, like a bush for example still look a bit mushy?

That’s what I want to know