Ikelite 5509.28 Zoom and Focus Gear Set Underwater Camera Accessories Replacement aluminum top mount with

Replacement aluminum top mount with 1/4-20 threaded attachment point

Canon 10-22mm

6 which lenses require a large dome port radius

The Canon 16-35mm Mk2 has a front filter thread of 82mm

a useful characteristic when working on the camera housing

Ikelite 5509.28 Zoom and Focus Gear Set Underwater Camera Accessories Replacement aluminum top mount withIkelite 5509. 28 Zoom Gear for Lenses up to 3 inch Diameter Product Details Ikelite's universal zoom sleeve and lens clamp set works with lenses whose zoom gears are between 2. 8 3" diameter. The most universal and affordable zoom gearing system in the industry. In the Box: Zoom gear Zoom clamp Foam strips