Entocentric lens

An entocentric lens is a compound lens which has its entrance or exit pupil inside the lens.

[1] This is the most common type of photographic lens.

The aperture diaphragm is located between the objective and the image-side focus (optics).

It corresponds to the "normal" human visual impression.

This photography-related article is a stub.

Entrance and exit pupils of an entocentric lens