SPECTROMETER INTERMEDIATE

Designed for student use yet capable of very high performance. Cast metal structure with wooden storage case. Scale 150mm diameter, readings to 1 minute of arc. Collimator 178mm focus aperture 25mm, adjustable slit 7mm. Telescope 178mm focus aperture 25mm, Ramsden eyepiece with glass cross line graticule. Both have rack and pinion focusing. Without prism.