Plano-convex lens Ø 30.0 mm - pack of 10 made of optical glass, ground and polished in 2 different magnifications; 12.0 and 16.0 diopters

Size: Ø 30.0 mm
Optical power: 12 diopters
Focal length: 83 mm
Rim thickness: 1.55 mm
Centre thickness: 4.2 mm
cylindrical rim 1 - 2.5 mm (pressed edge)

Size: Ø 30.0 mm
Optical power: 16 dioptres
Focal length: 62 mm
rim thickness: 1.6 mm
centre thickness: 5.3 mm
cylindrical rim 1 - 2.5 mm (pressed edge)

Tolerances:

From 40 mm Ø the size tolerances are subject to the deviations from the nominal dimension that the raw glass compacts exhibit.

These are:

for 40 - 75 mm Ø -0.3 mm
for 75 - 120 mm Ø -0.5 mm
over 120 mm Ø -0.8 - 0.9 mm