N1835-Z Zoom Gear ~for Nikon AF-S NIKKOR 18-35mm f/3.5-4.5G EDZoom 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 Nikon AF S NIKKOR 18 35mm f 3. 5 4. 5G ED 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 deadlines so