Qty Comments

The base, integral with the collimator tube support, carries the swinging telescope arm pivoted on a bearing with springloaded end thrust plates; this type of bearing eliminates any slack which would otherwise develop with wear. The collimator and telescope tubes are one piece precision casting in light ally, concealed helical action focusing devices are provided. The collimator slit with spring loaded jaws is of anew and robust design which ensures retention of the initial accuracy.

The graduated prism table support, 18 cm dia, is divided in degrees, the vernier, reading to 0.1 , is fixed to the telescope arm. This arrangement permits easy estimation to 0.05 from the conveniently positioned vernier scale. The fully adjustable prism, table, 705 cm dia, is engraved with concentric rings, which facilitate correct location of a prism and has two screwed holes for the attachment of prism and grating holder, to accommodate prism upto 25 mm high.

Large diameter clamping knob are fitted for movement control and fine adjustment is provided for the telescope. All bright parts are chromium plated with the base and tubes in synthetic (Hammer) finish.
Dimensions overall: 51 x 23 x 22 cm length x width x height. Without prism.