Plano-convex lens 183x72.2 mm 2.5 dioptres made of optical glass, ground and polished - rectangular

Size: 183x72.2 mm - rectangular
Optical power: 2.5 diopters
Focal length: 400 mm
Rim thickness: 8.0 mm small protective phase
Centre thickness: 28.5 mm

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