Sea & Sea Zoom and Focus Gear for Sigma Mini Zoom Macro 28-80mm F3.5-5.6 Zoom #42530

The zoom gear will mount to your zoom lens, for example a 28-80mm lens. This gear will allow you to zoom from 28mm to 80mm with a control knob on the housing. The zoom gear is not a permanent attachment to your lens. The gear may be removed or attached to your lens by simply sliding it on or off.