Abelson Select-A-Scope Pinhole Turret

Eight position pinhole turret with integral shutter. Shutter is cable release activated. Machined in the USA by Abelson Scope Works out of aluminum the turret is designed to fit a Copal 1 lens board hole. Accepts any 3/8″ diameter pinholes, slits or zone plates. Includes 10 pinholes, retaining ring and instructions for use and installation. Overall size is approximately 2″ x 3.25″ x 0.5″.