Hypotenuse 36 mm Height 25 mm
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Metal holder with sides grooved to hold lens up to 50 mm diameter on wooden support.
Rectangular, clear, all sides polished
All plastic frames
90 mm diameter,16 mm thickness
Rectangular, glass, back silvered, with protective coating
Glass, one each double convex, Plano – convex, concavo – convex, convexo – concave, Plano – concave and double concave lens, in box. Sizes in 38mm and 50mm. Lenses, Set of Six (50mm).
Brass dial head 40 mm diameter, divided and marked in 100 divisions, vertical scale 10-0-10 mm, fitted on tripod stand, distance between legs 40 mm.
Sizrs are mentioned below:- Screw pitch 1 mm Screw pitch 0.5 mm
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