This set comes with a free flexible gear belt can be used with any zoom or prime lenses with a wide range of lens diameters(any size from 46 to 110mm). The white mark ring is made of magnet material. It can be detached or attached easily and quickly from the follow focus. You can also buy additional mark ring.There is a release button on the side which can easily locate the focus. The gear wheel on it can be detached and installed in both sides,which makes it suitable for both left-hand and right-hand photographer. The connection mount to the gear wheel is not only the newest version but also the last upgrade version. There is an improvement on its inner structure to reach a high level in this field, the Dampened gear box, which permits much less backlash(even zero backlash),even better than most follow focus on the market. Quick-Release Version, easily attached and detach,Material: Aluminum Alloy, Plastic.

Lens Coating Description: ZERO Coating. Lens Design: Prime. Minimum Focal Length: 15 Millimeters. Maximum Focal Length: 60 Millimeters. Camera Lens Description: 15 millimetres. Lens Type: Standard. Brand: FOTGA. Date First Available: August 16, 2013. Best Sellers Rank: #87 in Camera Lens Rapid-Focusing Levers. Customer Reviews: 3.6 out of 5 stars 21 ratings 3.6 out of 5 stars. : B00EHCA926. Batteries Required?: ?No. Batteries Included?: ?No. Item Package Quantity: ?1. Style: ?DP3000 M3 Follow Focus. Size: ?Follow Focus. Is Discontinued By Manufacturer: ?No. Item model number: ?DP3003. Package Dimensions: ?11.6 x 9.3 x 3.7 inches. Item Weight: ?1.4 pounds. Part Number: ?DP3003. Manufacturer: ?Fotga.