Canon Extender EF 2x III circular The Canon ACK-E6 is a

The Canon ACK-E6 is a Canon Accessory That Helps You connect a camera to a household AC plug for long exposure shooting or extended use

no other foam is included

the included 200PL quick release plate has a 1/4" thread for compatibility with nearly any camera

Includes manual and quick reference card

and it's supplied here with a Fuji ST thread mount (which is compatible with most M42 cameras and adapters)

Canon Extender EF 2x III circular The Canon ACK-E6 is aCanon Extender EF 2x III teleconverter, in excellent cosmetic condition. Doubles the effective focal length of the lens mounted to it. Since the teleconverter extends into the back of the lens, not all lenses may be mounted: this works with select Canon L series telephoto lenses only. Please confirm compatibility between your intended lens and this teleconverter. Clean glass and excellent function. Includes front and rear caps.