The LuxGear Follow Focus Gear Ring from Cool-Lux is a seamless lens gear for lenses with a focus-barrel diameter of 88 to 89.9mm. It features standard 0.8-mod/32-pitch geared teeth that makes it compatible with cine-style follow focus systems. The gear slides onto your focus ring from the front or back of the lens and holds securely without the clamps, screws or zip ties that can interfere with your follow focus and limit your lens's rotation.

This gear is precision molded in high-durometer silicone and is available in 16 sizes, each designed to fit lenses within a two-millimeter diameter range, ensuring a tight compression fit on the focus barrel. To find the appropriate sized gear for your lens, please see the lens compatibility chart and sizing tools accessible by clicking on "Guides & Manuals."

Removable Cine-Style Lens Gear Ring    For Lenses with a 88 to 89.9mm Diameter    Slide-On Mounting, Compression Fit    No Dead Spots or Rotation Stops

Lenses with focus barrel diameter of 88 to 89.9mm, such as
Zeiss Milvus 85mm f/1.4 ZF.2& ZE
Nikon 28-70mm f/2.8D
Nikon 80-200mm f/2.8D
Canon 70-200mm f/2.8L USM IS II

0.8-mod/32-pitch geared teeth for compatibility with any standard follow focus system

Precision-molded, high-durometer silicone construction

Securely fits on the lens' focus barrel

Compression fit allows for easy tool-less installation and removal

Continuous 360° of rotation

Related Questions and Answers

Q: 1. does it work on panasonic leica 10-25mm F1.7 lens?

A: It does not. That lens has an 87.6mm diameter. Instead you will need BH #COLG8687 which works with an outer diameter between 86 to 87.9mm. https://bhpho.to/3d01Rzi

Q: 2. What size should I purchase for the Sigma 10-20mm f/3.5 lens?

A: Thanks! I realized I can just measure the circumference and divide it by 3.14 (pi) and it comes out to 76.75mm so I actually answered my own questions. It's the (76 to 77.9mm) version.

Q: 3. would this fit the 24-105 sigma art lens?

A: No. It is too small. The Sigma Art Lens diameter is 88.6mm and this ring is for 82-83.9 mm lenses.

Q: 4. Will this work on a Leica R 35mm f2?

A: Check your focus ring diameter. If it's between 60-61,9mm this ring will work. On the Lux gear site there are helpful charts and indications. Good luck

Q: 5. I have already made mistakes 2 times. What diameter should I use with Canon 100-400 mkII? On the widest part of focus ring.

A: I wish I could help but I have Nikon lenses myself. Best thing to do is check the specs on the canon webpage or contact canon direct to get the lens diameter.Failing that take a piece of masking tape and put it tightly around the lens barrel where the focus ring is. Take a pen or marker and put a line on the tape so it over laps the tape. Take the tape off and accurately measure the distance to get the circumference of the lens. Divide this number by Pi or 3.1416 to get your diameter of the lens.

Q: 6. Does it fit with the Canon 17-40 f4 L series lens, 24-105 f4 L series and 16-35 f4 L series? thanks

A: This ring is compatible with the 17-40mm F4 lens. However for the 24-105 F4 and the 16-35mm F4 you will need the Gear Ring that works with an outer diameter of 82 to 83.9mm which is BH #COLG8283. https://bhpho.to/2N5CJfx

Q: 7. Don’t see the Sigma 28-70 E mount listed. Which one would fit it?

A: Unfortunately , there are many untested lens models. However, Cool Lux offers a printable Luxgear ruler to measure lenses that are not on the tested list. RULER: https://bit.ly/3UvXRzb

Q: 8. Would this fit the Nikon 24-70 2.8 ED lens?

A: I have several Nikon Nikkor lenses and purchased a few Cool-Lux LuxGears to fit them. The Cool-Lux website has charts showing which gears go with which lenses, but I actually measured the circumference of each of my lenses to determine the proper sizes to order. And, the rings I ordered fit perfectly.

Q: 9. Does it work for a Sigma 16mm F1.4 m4/3 lens?

A: Yes it will, the Sigma 16mm f/1.4 DC DN Contemporary Lens for Micro Four Thirds has a 72.2mm outside diameter.

Q: 10. Will this fit a Canon 17-55mm f/2.8 IS EF-S?

A: It will not. The Canon 17-55mm F/2.8 has a 83.5mm diameter. Instead you would need B&H # COLG8283 which works with lenses between 82 to 83.9mm. https://bhpho.to/2wf9Uo5