Sea & Sea SS-31133 Focus Gear for Nikkor 105mm F2.8G ED-IF AF-S VR Micro

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Sea & Sea SS-31133 Focus Gear for Nikkor 105mm F2.8G ED-IF AF-S VR Micro
This Sea & Sea Focus Gear is used to manually focus the Nikkor 105mm f/2.8G ED-IF AF-S VR micro lens when used in a Sea & Sea housing.