TEC-2X (TEC2X): CBC-Computar 2/3" Extender (2X) for TEC-55

Model TEC-2X 2 times extender for Model TEC-M55 doubles the focal length to 110mm, reducing the field of view by 100%. Used with the extender, the lens has a 8.8 X 7mm field of view at minimum working distance (140mm) on a 2/3" camera.