RSC816-Z Zoom Gear ~for Sigma 8-16mm F4.5-5.6 DC HSM M85 Step 2: Make sure the

Step 2: Make sure the vacuum release ring is at its closed position by turning it clockwise until it cannot go any further

For housings with 8mm thread mounting hole

Lens holder allows for the storage of two 67mm threaded wet lenses on arms

This zoom/focus gear set is for the Tokina AT-X 11-20mm F2

400mm aluminum arm with standard 1" ball mounts on either end

RSC816-Z Zoom Gear ~for Sigma 8-16mm F4.5-5.6 DC HSM M85 Step 2: Make sure theZoom 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 Sigma 8 16mm F4. 5 5. 6 DC HSM 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 please