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The Zoom Gear for Nikon AF-S 14-24/24-70mm/ Tokina AT-X 11-16/12-24mm Lens from Aquatica mounts on the zoom ring of the Nikon AF-S 14-24mm f/2.8G ED, Nikon AF-S 24-70mm f/2.8G ED, Tokina AT-X 11-16mm f/2.8 AF PRO DX or Tokina AT-X 12-24mm f/4 AF PRO DX lens and enables zoom control when the lens is inside a port. It connects to a compatible underwater housing's zoom control knob. Manually rotate the zoom control knob to move the zoom back and forth while shooting.
For lens port and housing compatibility, see Type 4 Lens Chart