Hard stops made for your lens and focus motor.

Wireless focus motors calibrate by turning to the ends of the focus travel. On lenses without hard stops the ring slips past them. This generator adds two stops at the exact ends of your lens's travel, calculated for your motor's gear.

What you set

• Lens diameter and width, from the lens library or measured with tape
• Your focus motor: ARRI, DJI, PD Movie, Tilta, a reference tooth count or a custom gear
• Focus travel from close focus to infinity, measured with the guided tape method

What you get

• STL with stops placed for your lens and motor, clamping optional
• Print notes and your saved settings
• One personal fit correction for the same lens within 30 days
• Lens set price: every further ring in the same order costs at least 30% less

New to measuring? Read how to measure a lens for a focus gear.

More generators

The interactive generators need JavaScript. Every file is generated from your dimensions in millimetres, with module 0.8 teeth and engraved sizes.