The autofocus feature supports most conventional cinema lenses with built-in hard stops. It does not currently support non-hard stop DSLR lenses or certain macro lenses with non-linear progressive magnification. Electronically controlled lenses with no hard stop focus, if there is a depth of field scale on the focus ring that indicates the focus position, autofocus can still be used. The prerequisite is to manually calibrate the effective focus range of a lens. using the manual lens calibration function, based on the depth of field scale. Additionally, during calibration, it is important to note that SLR lenses with a depth of field scale actually have a very subtle limit that can be surpassed. We can manually calibrate the lens travel based on this subtle limit. Afterwards, autofocus MARK points can be set.