Its optical system and features are equivalent to those of advanced model making it still able for senior students to do many quantitative experiments. Substantial iron casted base with leveling screws, protected graduated disc 150 mm diameter, fixed to table, double ended single vernier reading to 1 minute of arc attached to telescope. Optics Telescope : 178 mm focus achromatic objective, 25 mm clear aperture, 8 X Ramsden eye-piece with cross line graticule, rack and pinion focusing. Collimator Mounted on fixed pillar and fitted with achromatic object glass 178 mm focus, 25 mm clear aperture, adjustable precision slit, rack and pinion focusing. Prism table with leveling screw and its height is adjustable, surface marked with parallel lines to facilitate leveling of prism. Supplied complete with prism clamp and grating holder, watch makers eye lens to read vernier and tommy bar without prism and gratings. Supplied in beautifully polished wooden case with lock and key. |
