I just bought a used Sigma lens (50 mm art f / 1.4) for my Canon 7D2 (Mark II) case. This combination creates a very serious problem of gravity:
- Without correction of micro-adjustments on my body, the aircraft in focus is about half an inch farther from the one I target with the viewfinder: for a portrait of someone located a few meters away, when you focus on the eye, the focused area is somewhere between the eye and the ear.
- With the maximum correction of micro-adjustments in my body (-20 of -20 / + 20 range), the problem of the rear focus is attenuated, but still there. I imagine that -25 or -30 could have solved this problem, but it is not available.
- when you use Liveview to focus, everything is fine.
Do you think using the Sigma USB Access Station to adjust the focus setting of the lens would solve this problem? Do I have to resell it and buy another copy?