Athena Focus Gear for Canon EF 16-35mm f/2.8L II USM Lens @inonadmount the standard clamp can be

the standard clamp can be used but only if you do not want the arms to fold together side-by-side

without opening the housing

Add a second handle to your DSLR tray and handle

Weight with battery: 1243 grams (2

Athena Focus Gear for Canon EF 16-35mm f/2.8L II USM Lens @inonadmount the standard clamp can beThis 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