This product has been discontinued. Limited stock is available. 

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 Olympus M.Zuiko Digital ED 12-50mm F3.5-6.3 EZ lens and is designed to use with NA-GH5 and NA-EM1X. To use with other MIL housings, additional gear ring SKU #90167 is required.