The Aperture Control E-Module is a Pico Technical Camera  accessory designed for seamless integration with the new Arca 24, Arca 50, and Phase One blue and silver ring lenses. For aperture control, the e-module is equipped with a mini USB cable that plugs directly into a port located on the front frame.

Aperture control in 1/3 stop increments
OLED display provides aperture and focal length information
Adjustable magnetic connection
Includes an internal rechargeable battery, with USB-C cable for charging

Compatible with Pico Technical Camera only