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Glass Cylindrical Lens, Bi-Concave 50X45Mm Fl 72Mm
50x45mm lens with concave curvature and 72mm focal length.
Lenses Spherical Bi-Convex, 75 mm Diameter, Focal Length 500mm
Made of polished glass with ground edges
Lenses Spherical, Bi-Convex, 38mm Diameter 50mm
Bi-convex spherical lens, 38mm diameter, 50mm focal length.
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