A brass disc 75 mm diameter mounted on a 62 mm rod giving an overall height of 62 mm
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Polished 90 mm dia & 20 mm thick approx.
Six lenses with ground & polished faces & ground edges. Comprises one each of: double convex, plano convex, converging concave-convex, diverging concave-convex, double concave, & plano concave. Supplied in a velvet lined box.
Optically worked, ground edges
Made of optically flat plates cemented together. Dimensions 50 x 50 x 50 mm
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