Objective Lens

Home / Glossary / Objective Lens

The objective lens of a telescopic sight is also known as the entrance lens. Measured in millimetres, it corresponds to the value after the x. E g. a 5-25×56 has an objective lens with 56mm diameter. The diameter of the objective lens determines the amount of light that can reach the user’s eye. With a constant magnification, an increase in the objective lens diameter leads to an enlargement of the exit pupil.

Steiner Australia
Steiner Australia Logo
x Logo: Shield Security
This Site Is Protected By
Shield Security