For student 4 Vernier type. Independent telescope and table verniers reading to 30" of arc.
Fixed graduated disc 190 m.m diameter with completely independent table and telescope movements, each fitted with double-ended verniers, to read to 30" or 20" of Arc. Both rotations have fine-adjustment screws and release of a clamping screw enables coarse adjustments to be made by hand. Telescope and collimator are fitted with 178 mm. focal length, 28 mm. dia achromatic objectives and have rack and pinion focusing; telescope fitted with Ramsden eyepiece and crose-line graticule;


Ramsden eyepiece and crose-line graticule;
collimator with adjustable slit, length 6 m.m. mounting of telescope and coilmator permits accurate levelling of axis and squaring to axis of rotation.
The spectrometer table, marked with lines to assist positioning of prism in relation to levelling screws has interchangeable clamping units for prism and diffraction grating.