What does varifocal mean?
A varifocal is an adjective used to describe an object or system that has a variable focal length, allowing the user to adjust the focus to suit different distances or situations. This can be seen in lenses, cameras, and other optical instruments. The term is often used in technical contexts, such as optics and photography, but can also be used in everyday language to describe a product or feature that offers adjustable focus. Varifocal lenses are commonly used in glasses and contact lenses to provide clear vision at different distances. The term is derived from the words 'focal' and 'variable', indicating the adjustable nature of the focus.
adjectiveHaving a variable focal length, allowing the user to adjust the focus to suit different distances or situations.
- 1. Having a variable focal length, allowing the user to adjust the focus to suit different distances or situations.
"The varifocal lens on my glasses allows me to see clearly whether I'm reading a book or looking at something far away."
"The varifocal lens on my glasses allows me to see clearly whether I'm reading a book or looking at something far away."
"The camera's varifocal lens allows me to zoom in on the subject without losing focus."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of varifocal
The term 'varifocal' is derived from the words 'focal' and 'variable', indicating the adjustable nature of the focus. The word 'focal' comes from the Latin word 'focus', meaning 'hearth' or 'fire', and was later used in optics to describe the point of convergence of light rays. The word 'variable' comes from the Latin word 'variabilis', meaning 'changeable' or 'capable of change'.
Usage notes
Varifocal is often used in technical contexts, such as optics and photography, but can also be used in everyday language to describe a product or feature that offers adjustable focus. The term is commonly used in the context of lenses, cameras, and other optical instruments.