Power Zoom gears allow access to the mechanical zoom function of supported lenses. Use of this gear may require the use of additional port extensions or adapters. Check the Port Chart for more details. This zoom gear is for the Panasonic Lumix G X Vario PZ 14-42mm F3.5-5.6 ASPH. POWER O.I.S lens. NOTE: This gear is compatible with the Nauticam  NA-GH5 housing.