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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.
Lenses Spherical, Bi-Convex, 50 Mm Diameter 50Mm
High-quality optical magnification for precision viewing.
Lenses Spherical, Unmounted, Bi-Concave 50 mm Diameter Fl 500 mm
Unmounted bi-concave lens, 50 mm diameter, 500 mm focal length
