I was testing my Sony 55mm comparing it to a Sony 24-105 on an A7R4. Everything says the 55mm should be sharper but it is not. I have run several tests at different depths/distances using auto focus and manual focus but the results are always the same. I was thinking of sending it in for a repair but to be honest, I am not certain it was ever sharp. It was my first lens and I did not know enough about photography and equipment to think about these things.
My question is can a lens be repaired for sharpness.