Nauticam Gear for Sigma AF 10-20mm f/4-5.6 EX DC HSM Canon

Zoom gear for Sigma AF10-20mm F4~5.6 EX DC HSM Canonlens

The zoom gear use on following port:
a) use with extension ring 20 and 8.5' fisheye port
b) use with extension ring 60 and 6' dome port
c) use with extension ring 20 and 8.5' white balance port

Dimension: 102 mm x 79 mm x 11 mm
Weight: 77g / 6g
Construction: Anodized aluminum alloy & Nylon