ASTRONOMICAL TELESCOPE Reflecting type, fitted with about 45 mm dia achromatic objective having focal length of about 45 cm. Focussing is provided by rack and pinion. Complete in carrying case wth the metallic three legged folding type tripod stand....
TELESCOPE MODEL ASTRONOMICAL To show the working of astronomical telescope, comprising a plano convex lens dia. 38 mm. fl 100 mm, mounted in a metallic tube which slides in an outer tube of 400 x 42 mm, size, with a convex lens objective dia. 50 mm fl 500 mm, packed in case....
A high class telescope for school students for all around purpose. It is light and easy to manipulate and has a high magnifying power. Overall length of astronomical telescope is 85 cm, fitted with high class achromatic objective of dia. 45 mm,...
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...