Was trying out my camera yesterday with a friend. He noticed this thing: My camera has a back focus problem with his lens, which does not have this problem on his camera. Then I switch to my lens (50mm 1.8) on my camera, and noticed the same thing. I shoot very close at 45 degree to a poster, the letters in front of the letter I focus is sharp, but not the one I focus. Went home, tried with other 2 zooms I have but the back focus is less noticeable (probably due to the aperture, can only go to f4 compared to f1.8 of the 50mm). He shoot macro so he can notice this problem. I shoot general things and never paid attention to it, sometime when photo not sharp, I will think is my hand or skill Probably can get it re-calibrated by CSC since all the lenses and camera are still under warranty. I am reading how to do a more scientific mis-focus test chart from the internet and will try later.
Calibration is done to the camera body or to the lens? Asking this because, if to the lens, mean every lens I have to ask them to calibrate? And when I buy new lens or sell the camera, I or the buyer have to redo this process again? Thanks!