GearCast Video - Sachtler Ace Follow Focus

Sachtler's S2153-0001 is their Ace Follow FocusDefinition:
Controlling lens focus to keep subject in focus considering movement of subject or camera., a compulsory piece of equipment for more efficient and precise shots. The Ace Follow Focus shines with many features like backlash-free performance, exact lens control hard stops and pinion / friction wheel insertable on every gear box side.

The direction of rotation is changeable depending on various camera or lens configurations. For setting focal distances it comes supplied with two interchangeable marking disks that are easy to remove and to replace.