Nimar Zoom Gear for Canon EF 24-70mm f/2.8L USM Lens in NI203A or NI203G Lens Port

With this NiMAR Zoom Gear affixed to your Canon EF 24-70mm f/2.8L USM lens, you'll be able to control the focal length remotely in an underwater camera housing with a NiMAR NI203A or NI203G lens port. For full compatibility info, see the Port Chart.