SN1770OS-Z Zoom Gear ~for Sigma 17-70mm F2.8-4DC Macro OS HSM canon This mechanism can also be

This mechanism can also be removed

and Using the CMC-2

Required RED Components:

This 23cm lanyard securely attaches to supported handle brackets with the supplied snap hooks and allows for easy lifting of the housing

An optional LCD window (p/n #17171)

SN1770OS-Z Zoom Gear ~for Sigma 17-70mm F2.8-4DC Macro OS HSM canon This mechanism can also beZoom 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 17 70mm F2. 8 4DC Macro OS HSM (Nikon mount) lens. Product Manual PDF