EA1635-Z Zoom Gear for Sony LA-EA3 ~with SAL1635Z Vario-Sonnar T* 16-35mm F2.8 ZA SSMZoom 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 Sony LA EA3 A Mount Adapter with SAL1635Z Vario Sonnar T* 16 35mm F2. 8 ZA SSM 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