ALZO Smoothy Zoom Focus Assist - works like follow focus - adapts to many different camera lens

The ALZO Smoothy Zoom / Focus Assist is a very low cost device that easily attaches to DSLR lens rings and allows for smooth zooms and focus pulls. It is a good replacement for a follow focus at a fraction of the cost. For full lens zooms or deep focus pull actions, this device is superior. It easily covers the full lens ring range without pauses or extreme wrist twists required with a follow focus. Fits Lens rings from 50mm to 80mm diameter.