Quote:
Originally Posted by mattyande
Nice... And the bodies remember this so it's already done when you put the lens on, right?
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Yeah, it's all automatic after you get the values plugged into the camera. It even knows when you put a teleconverter on a lens and treats that combination as a new lens. The toughest part is zoom lenses because the camera can only save one value for each lens, which is annoying. Like on the 24-70, you might need -3 at 24mm, but +5 at 70mm. Well since the camera can only save one value you have to either pick something in the middle or pick the value for the focal length you most often use.
The process to get these values is tedious, so look up some tutorials to do it right. The newer Nikon cameras (D5, D850, and I think D500) have auto-AF tuning, which is pretty nice. It still requires taking focus chart shots, but the camera will automatically calculate the correct AF value to plugin once it has the shot (recommended to do it 10 times for each lens and pick the value that comes up most often since it can vary from shot to shot).