Athena Focus Gear for Canon EF 16-35mm f/2.8L II USM Lens @focustargetlight and other 67mm threaded wide

and other 67mm threaded wide angle lenses

1-inch Ball & YS mount

The Reduction ring will narrow the light beam and help reduce backscatter for macro or low visibility photography

Weight: 55

Athena Focus Gear for Canon EF 16-35mm f/2.8L II USM Lens @focustargetlight and other 67mm threaded wideThis focus gear enables manual focus adjustment for the Canon EF 16 35mm f 2. 8L II USM lens via the Athena Extension Ring 60 with Focus Knob when used with Sea&Sea MDX series or Nauticam dSLR housings. The focus gear is useful in the following situations: * When you shoot fast moving subjects, like dolphins under limited ambient light (dark environment), so auto focus does not function effectively. * When you shoot half in half out photos and would