The LuxGear Follow Focus Gear Ring from Cool-Lux is a seamless lens gear for lenses with a focus-barrel diameter of 78 to 79.9mm. 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."

Lenses with focus barrel diameter of 78 to 79.9mm, such as
Zeiss Milvus 50mm f/1.4 ZF.2 & ZE
Zeiss Milvus 50mm f/2 ZE
Zeiss Planar T* 85mm f/1.4 ZE
Nikon 24-85mm f/2.8-4D
Nikon 135mm f/2D
Nikon 85mm f/1.4D
Canon 35mm f/1.4L
Canon 24mm f/1.4L

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. 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: 3. Is the rubber strong enough to resist the torque of a Title Nucleus motor? (Title rings are not strong enough even if they are 0.8)

A: The Cool-Lux LuxGear gear rings are designed to be compatible with all standard follow focus motors.

Q: 4. what size is needed for the sony 24-70 version ii? what about the 70-200 ii (Gmaster lenses)

A: To find the correct size for your lens, please follow the instructions on this page. https://store.cool-lux.com/collections/luxgears

Q: 5. Will this fit the Tokina 11-16 atx-i 11-16 f2.8 CF lens for Canon EF?

A: 123

Q: 6. 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

Q: 7. Does this work with the Sigma 18-35 Art lens, considering it has 72 mm in diameter?

A: You chose wisely. This gear is listed by the company to fit the Sigma 18-35mm.

Q: 8. Will this work with the neewer follow focus?

A: This features standard 0.8-mod/32-pitch geared teeth. If it will work depends on the exact follow focus, but it more than likely will work.

Q: 9. As for the Sigma 18-35mm Art lens, will it fit both rings (zoom & focus).... or is the zoom diameter different from the focus diameter?

A: zoom is different, smaller. my caliper measures 75mm.

Q: 10. Would these also fit the other Loxia lenses? I believe they have identical barrel diameters.

A: Yes these lens gears should work on any of the current Loxia lenses.