for 15 mm Lightweight Support - designed with lighter cameras in mind and compatible with all availableARRI lens gearsand focus knobs.Cine has a gear ratio of 2:1 for cine style lenses,which means one turn of the focus knob will resultin two turns of thefocus gear. This gear ratio is commonto all classic follow focus units from ARRI (FF-3, FF-4, etc.) andis traditionally suited to cine lenses such as Ultra Primes,Compact Primes, Alura Zooms, Angenieux Zooms, etc...
HD has a slower gear ratio of 1:1 for 2/3” broadcastand still photo lenses. In this case, one turn of the focus knob willresult in a single turn of the focus gear. This particulargear ratio might bepreferred when using lenses with a short focusthrow, where the scale from minimal focus to infinity is so short that atraditional 2:1 ratio could be too direct, lackingin precision. Typical lenses suited to the HD ratioare modern still prime lenses, some ENG zooms, extreme wide-angle lensesor some older designs.For Marking Disks please see chapter inchMarking Disksfor Follow Focus inch
Arri Mini Follow Focus MFF-2 Cine base
- gear ratio 2:1 to use cine style lenses