Standard Steel Spectrometer

Good for many quantitative light experiments by students at Junior level, reading to 0.10 (6 minutes of arc)
The base combined with the collimator tube support, carries arc rotating telescope arm. The collimator and telescope tubes are one piece casting of light alloy, focusing by friction drive rack and pinion, 170 mm dia circular scale reading 0.10 but 0.050 can be estimated due to larger width of scale,

Optics: Telescope : With achromatic object glass of 170 mm, focus, 21 mm clear aperture, 8 X Ramsden eye piece with hair line graticule, helical focusing, fine motion, tangent screw for finer adjustment.
Collimator: Mounted on fixed pillar with axial adjustment. Objective 150mm F.L. and 21mm aperture, helical focusing, unilateral adjustable slit 6mm long.
Prism Table: fitted with three spring loaded leveling screws and marked lines.
Supplied complete with tommy bar, screw driver and grating holder but without prism and gratings.
This Spectrometer is normally supplied in strong cardboard box but it can be supplied in wooden box with lock & key on demand.