While performing the calibration steps it is important to not deviate too much from the working distance in order to keep the calibration field in focus.

The focus assessment option can help with this task. It is located in the Hardware settings → Cameras menu.

When activated, the software will monitor the calibration snaps and will suggest repeating a step if low marker sharpness is detected.

Markers going out of focus can be caused by incorrect plate position or lens adjustment.