This Pre-Marked Focus Ring from Teradek features 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. Hi there. Could you please advise what the right size is for the Sony 100-400mm f4.5-5.6 is? It is not on the lens guide. The lens has a 77mm filter. Cheers.

A: With these, you have to measure the outside of the lens because they only give you the threaded diameter length; but the Sony 100-400mm f4-5.6 has around a 94mm outer diameter. You could try the 88-90mm version but I doubt it will stretch to 94mm.

Q: 2. 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: 3. What are the correct filter sizes for? Sony 16-55 mm f/2.8 G Sony 70-300mm f/4.5-6.3 G OSS Sigma 16mm f/1.4 E Sigma 30mm f/1.4 E

A: The Tilta Seamless Focus Gear Ring size for the 70-300mm Sony lens is gear model B&H # TITAFGR8183 https://bhpho.to/40mBR9i All the other lenses on your list would need to be measured for the correct size. I have included a link to the ruler and tested lens list below: How to measure: https://bit.ly/3JZlfiH

Q: 4. 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: 5. What’s the diameter of the hole?

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

Q: 6. 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: 7. 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: 8. 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: 9. Does this works with the Sirui anamorphic MFT 75 mm ?

A: For the Sirui 75mm f/1.8 1.33x Anamorphic Lens (Micro Four Thirds) the Tilta Seamless Focus Gear Ring (75 to 77mm) is likely too big, since the lens has a diameter of 73 mm. I recommend using the Tilta Seamless Focus Gear Ring (72 to 74mm) instead. See: https://bit.ly/3DmqZ2n

Q: 10. Gear sizes for Panasonic Leica 10-25mm f1.7?

A: You will need the 85-87mm Focus Gear Ring for the Panasonic Leica 10-25mm lens. Here are FAQs for the Tilta Seamless Focus Gear Ring. https://tilta.com/product_support/seamless-focus-gear-ring/