This Teradek Pre-Marked Focus Ring 6.6' Metricfrom Teradek Pre-Marked Focus Ring 6.6' Metricfeatures metric 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 6.6' (2m). The pre-marked ring saves calibration time when swapping out lenses.

For CTRL.1 Lens Controller Unit    RT Lens Mapping    6.6' Minimum Focus    Markings in Metric 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. 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: 2. Will this work with the ronin rsc2 focus motor? seeing a lot about the tilta gears not lining up nicely

A: The gearing present on the SmallRig Seamless Focus Gear Ring (75 to 77mm) should not have an issue with the use of the DJI Ronin Focus Motor for RS 2 and RSC 2 on the DJI RSC 2 Gimbal Stabilizer.

Q: 3. Which gear ring would I need for a Tamron SP 15-30mm F/2.8 Di VC USD? Note, I mean the first generation one, not G2 -- but I assume they're the same size.

A: Since the Tamron SP 15-30mm F/2.8 Di VC USD has a 98.4mm diameter, you will need a gear ring that is fits a 98.4mm diameter.

Q: 4. Will this work for the Sony 85 mm 1.8 E mount?

A: It will not. That lens has a 78mm diameter. You would need this one instead: https://bhpho.to/2Psl1Y7

Q: 5. Will this fit the focus ring on Zeiss Milvus 25mm f1.4 Distagon EF?

A: Yes, the Tilta Seamless Focus Gear Ring (81 to 83mm) fits in the focus ring of the ZEISS Milvus 25mm f/1.4 ZE Lens for Canon EF which has a focus ring diameter of 82mm.

Q: 6. What is the correct size for the focus ring of the Sony 35mm f1.4 GM lens?

A: The 75 to 77mm illustrated in your link is the correct focus ring size.

Q: 7. Are these compatible with the Arri SXU-1 (Single Axis Unit)?

A: Yes it is. This can be used with B&H # ARSXU1 as well.

Q: 8. What's the zoom ring size for rf 15-35 and rf 70-200?

A: Unfortunately, The new Canon RF lens models have not yet been tested by Tilta. Tilta provides the following ruler to help you measure your lenses for their Seamless rings. https://bit.ly/3oUrrgH

Q: 9. I'm looking for a seemless focus gear ring compatible with the zoom ring for the Tamron 70 - 200 F2.8 G2 lens for Canon Cameras?

A: The lens that you are working with has not been tested for size. Please use the ruler below to measure the size of your unlisted lens model when using Tilta or Smallrig Seamless Focus Gear Rings. RULER: https://bit.ly/4317M0x

Q: 10. Which one fits the new Sony 24-70 f2.8 mk ii?

A: Yes, the lens falls between 66 to 68mm and will work with the focus gear.