Enjoy smooth, seamless lens operation underwater when using AquaTech's 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.
Compatibility
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)
P-100 port does not allow for use of filter
P-100 port does not allow for use of filter
UPC: 810778004137