Enjoy smooth, seamless lens operation underwater when using AquaTech 10912 CZ 17-40mm Zoom Gear for the Canon 17-40mm f/4 Lens. Mount the gear on the zoom ring of your lens, then connect it to the zoom control knob of your AquaTech Delphin or Elite Sport Housing. When you're ready to shoot, you'll be able to zoom the lens back and forth from outside the housing.
Compatible with the Canon 17-40mm f/4 Lens in AquaTech's P-100 Lens Port (above water) or PD-85 Dome Port with P-70 EX Extension Ring (underwater)
|Gear Type||Focus Gear/Zoom Gear|
|Lens Compatibility||Canon 17-40mm f/4|
|Dimensions||ø: 96.01 x L: 36.07 mm|