A prime lens has one fixed focal length.
It is a useful choice when a particular framing and aperture suit your work.
Many primes offer wide maximum apertures. Framing changes require moving, cropping or changing lenses because there is no optical zoom range.
Set a zoom lens to one focal length for a short walk. Practice finding pictures with that fixed view.
A prime is not automatically smaller, cheaper or sharper than every zoom. Compare the actual lenses.
Follow a connection to understand how these ideas fit together.
A prime has a single focal length; a zoom can change focal length within a range.
This comparison works in both directions.
One fixed focal length defines a prime lens.
A lens opening regulates the light through a prime lens.
Using a fixed lens may lead you to move for framing, changing the viewpoint.
Conditions: The perspective change comes from the new position.
Source check: . This records a check of the supporting references; it is not an expert endorsement.
Many primes offer wide maximum apertures. Framing changes require moving, cropping or changing lenses because there is no optical zoom range.