Physics > Light & Optics > Magnifiers

Bi-convex lens fitted in nickel plated metal frame with metallic handle.

Diameter Focal Length Magnification

(a) 50 mm 10 cm 3.5 x

(b) 50 mm 15 cm 2.5 x

(c) 60 mm 15 cm 2.5 x

(d) 60 mm 20 cm 2.25 x

(e) 75 mm 15 cm 2.5 x

(f) 75 mm 20 cm 2.25 x

(g) 100 mm 15 cm 2.5 x

(h) 100 mm 20 cm 2.25 x

Fitted in unbreakable plastic mount with handle

(a) Dia 40 mm (b) Dia 50 mm (c) Dia 60 mm (d) Dia 75 mm

Fitted in plastic frame, 20mm dia lens approx (a) Single 4 x (h) double 7 X (c) Triple 10 x

A high quality X30 magnification instrument with built in illumination and a retractable condenser.

Consist of a large biconvex lens 100 mm dia, 2.5x magnification mounted in flexible arm 30cm approx and heavy painted, cast iron base, easy to use in any position/plane.