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 20". The pre-marked ring saves calibration time when swapping out lenses.

For CTRL.1 Lens Controller Unit    RT Lens Mapping    20" 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. I have the Canon 24-70mm USM lens which size would be best for the focus gear?

A: We have found the Canon EF 24-70mm f/2.8L II USM Lens to have an 82mm diameter for its focus ring. As such, the Tilta Seamless Focus Gear Ring (81 to 83mm) should work great for it.

Q: 2. What is the correct size for the Sony FE 50mm f/1.2 GM Lens focus ring?

A: You should use the 81 to 83mm Tilta Seamless Focus Gear Ring.

Q: 3. Do these screws work with the Ikan EC1 release plate

A: It's advised to not use the D-ring screw since it can get in the way of the base plate.

Q: 4. 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: 5. Gives the depth of the screw but does not give the diameter of the head. What is the diameter of the head?

A: The head diameter of the head with D ring is 5/8".

Q: 6. 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: 7. What is the correct size for the Canon EF-S 17-55mm f/2.8 Lens focus ring?

A: The focus ring on the Canon EF-S 17-55mm f/2.8 is 77.7mm. This Tilta Seamless Focus Gear Ring (75 to 77mm) should fit. However, you may wish to also get the Tilta Seamless Focus Gear Ring (78 to 80mm) BH #TITAFGR7880

Q: 8. Hi, I'm looking for softboxes larger than the Angler Silverboxes. So what brands of softbox with grid that's available from B&H and is compatible with this speed ring? Thank you

A: We do not recommend going any larger than 24 x 32", since the Angler Shadow Focus Light cannot hold much weight. A suitable softbox to fit the ring in question is the Impact Luxbanx Duo Medium Rectangular Softbox (24 x 32"), B&H # IMLBRDM. https://bhpho.to/38XUpmn

Q: 9. RT Receiver Rail Clamp for 15/19mm rods fits 1/4-20 will it work with the Teradek Bolt 6 LT 750 3G-SDI/HDMI Transmitter?

A: Yes, the Teradek RT Receiver 19/15mm Rod Clamp with 1/4"-20 Mount will mount to the bottom of the Teradek Bolt 6 LT 750 3G-SDI/HDMI Transmitter.

Q: 10. Hi! Which one for the: Sirui 50mm f/1.8 Anamorphic?

A: The proper ring for this: https://bhpho.to/3e64SPM