Definition, Meaning & Synonyms

parfocal

adjective

/ˈpɑːrˌfoʊ.kəl/

Definition

A term used to describe optical systems that remain in focus when switching between different objective lenses or magnifications.

Examples

The laboratory’s advanced microscope is parfocal, making it easier to examine samples at various magnifications.
When using a parfocal lens, switching from low power to high power magnification did not require any refocusing.

Meaning

Parfocal refers to the ability of a microscope or camera system to maintain focus as the operator changes from one lens to another, allowing for easier adjustments without needing to refocus.