The Cable Switch A is an accessory for cameras with magnetic release. It is useful when you mount your camera on a tripod or a copy stand and photograph with a slow shutter speed. Screw in the tip of the Cable Switch A to the shutter release button of the camera and depress on the trigger button of the Cable Switch A.
It can be used on the Remote Battery Pack (for the Winder LX and the Winder ME II).
