P120 F Focus Gear for Mamiya 120mm f/4 Macro & Phase One 120mm f/4.0 Macro Lens - Precision Macro Photography Accessory for Studio & Outdoor Shooting

Focus gears allow access to the mechanical zoom function of many lenses. Use of these gears may require specific port extensions and may not be available for all housings and lenses.

This focus gear is specifically made for the Mamiya 120mm f/4 Macro lens and Phase One Digital 120mm f/4.0 lens.