XZ50-A Aperture Gear ~for Carl Zeiss Touit 2.8/50M (X-mount)Aperture gears allow access to the mechanical aperture 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 aperture gear is for the Carl Zeiss Touit 2. 8 50M (X mount) lens. This item is non returnable, non refundable, non cancellable, and may be subject to extended lead times as it is manufactured on demand. We always do our best to meet trip