This Pre-Marked Focus Ring from Teradek features imperial measurements and is designed for use with the CTRL.1 lens controller unit for automatic calibration and RT lens mapping. It supports a minimum focus distance of 10'. The pre-marked ring saves calibration time when swapping out lenses.

For CTRL.1 Lens Controller Unit    RT Lens Mapping    10' Minimum Focus    Markings in Imperial Measurements

Auto-calibrate lenses to pre-marked focus rings

Save time on set from manually calibrating after every lens swap

Related Questions and Answers

Q: 1. Any experiences with the Sigma 18-35 and Sigma 50-100? Which size would be best?

A: The Sigma 18-35mm Art lens has a 78mm diameter, you would need BH #TITAFGR788 instead. While the 50-100mm has a 93.5mm diameter and you would need a universal gear like BH #WILU for that one. https://bhpho.to/3kOCoMI https://bhpho.to/309Ib7v

Q: 2. Will this work with the new Tamron 35-150 f2/f2.8 E mount?

A: The Tilta Seamless Focus Gear Ring (81 to 83mm) would not fit on the Tamron 35-150mm f/2-2.8 Di III VXD Lens (Sony E) as it has a diameter of around 89mm. It would be recommended to measure the size of the control ring that you would like to mount the gear ring on in order to get the best fit.

Q: 3. I am looking to get these for old Nikon Ai-s photo lenses and a few voigtlander lenses. Is the diameter the same as the filter diameter or do I need to measure around the focus ring somehow?

A: Please use this ruler to measure your lenses for the correct size seamless Tilta ring. Ruler - https://bit.ly/3TlOugU

Q: 4. "The black 7artisans Lens Focus Ring Tab is designed to fit select lenses. " That's nice. What are those lenses?

A: This product is meant for use with the various lenses made by 7artisans: https://bhpho.to/2LjB8CE

Q: 5. It reads the item is 12" long, does it only make one ring or can you make more?

A: This is 12" long, which is enough for a 4" diameter lens size. This really is only for a single lens.

Q: 6. Is it long enough for Nikon 58mm 0.95 Noct?

A: The CINEGEARS Customizable Geared Focus Ring (B&H# CI1401), in its official sizing, is 0.02 of an inch too small for the Nikon NIKKOR Z 58mm f/0.95 S Noct Lens (B&H# NIZ5895). However, given how close that is, you may be able to get it to fit, especially if the ring is placed in very hot (but not boiling) water for a few seconds prior to useage. However, as an alternative, the Tilta DSLR Lens Follow Focus Adapter (B&H# TIFRT03) will fit the Noct: https://bhpho.to/3W0Ka8l

Q: 7. Will this work with komodo through a breakout such as the wooden camera b-box?

A: The 4-pin end on the Teradek RED Run/Stop Cable for MDR.X Receiver (10") can connect and communicate with the 4-pin control port on the Wooden Camera B-Box for RED KOMODO when connected to the RED DIGITAL CINEMA KOMODO 6K Digital Cinema Camera (Canon RF).

Q: 8. What’s the diameter of the hole?

A: Outer diameter 5 5/8” Inner diameter 4 7/8".

Q: 9. What is the correct size for the Sigma Art 18-35mm f/1.8 Lens EF focus ring?

A: The Tilta Seamless Focus Gear Ring (75 to 77mm) BH #TITAFGR7577 can be used for the Sigma 18-35mm F/1.8 focus ring. If looking for a ring for the zoom ring, it will be 78-80mm.

Q: 10. Would this work for Canon RF 24-70mm lenses made for Canon mirrorless cameras?

A: You're better off with the 88mm to 90mm ring if you're using the Canon RF 24-70mm f2.8 lens.