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A simple model to show the principles of the astronomical telescope, which produces an inverted image. Comprising a plano-convex lens 38 mm dia x 150 mm focal length, mounted in a tube 400 x 50 mm dia, and a double convex lens 50 mm dia 500 mm focal length, mounted in a tube 400 x 55 mm dia approx. The small tube is located in the large tube by means of foam plastic rings, for effective sliding.
This mount is used to investigate the principles of lenses and their magnification, telescopes and compound microscopes.An angle sections metal bar 750 x 25 x 25 mm with a support rod 150 x 10 mm diameter for mounting in an ordinary laboratory stand and boss. Three spring lens holders are provided, one for 50 mm and two for 25 mm lenses, mounted on spring clips, to permit movement along the bar for focusing.
Made up of diverging eyepiece lens and a convergent objective lens. The telescope provides an erected image with approximately 3 x magnifications. Complete with lenses, mounted on metal tripod stand, with diagram of rays shown.
This telescope is mounted on a specially designed carriage with support ring to stop abrupt falling. The carriage is fitted with two adjustable screws for precise vertical and horizontal positioning. This arrangement is mounted on a 25mm dia 450mm long steel pillar, fitted on a cast iron base with leveling screws. A scale holder ; provided with scale
