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Bi-Concave Glass Lens, 50 mm Diameter, 300 mm Focal Length
Diverges incident light for optical experiments and beam control.
Bi-Concave Glass Lens, 75 mm Diameter, 200 mm Focal Length
Polished glass diverging optic with ground edges.
Glass Cylindrical Lens, Bi-Concave 50X45Mm Fl 72Mm
50x45mm lens with concave curvature and 72mm focal length.
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