Looking for ultimate focussing precision ?
CAPcam allows finest lens movements. Automated focus bracketting captures a series of images with user definable focus change.
Manually select the optimum result or use these images for processing with a focus stacking software (e.g. Helicon Focus).
The example shows a series with 5mm focus adjustment between the images. Starting at an object distance of 850mm.
Enlarge the crops to see the difference.