Special Features
C/o telescope, colorimator, prism table mtd on central support shaft, w/degree and angstrom scales on base, prism table, telescope and scaleplate independently rotatable, telescope and collimator w/achromatic objectives of 20.5 mm diameter and 155 mm focal length w/sliding focal adjustments, 90 degrees crosshairs reticle, prism-table cover provided for observations w/out darkening room
