Which of the following best describes a fixed lens?

A fixed lens is characterized by having a single, fixed focal length, meaning it does not zoom or change to capture images at different distances. This type of lens is designed with a predetermined focal distance, resulting in a set field of view. Photographers often prefer fixed lenses for their ability to provide sharper images and wider apertures compared to zoom lenses. Fixed lenses are also typically lighter and more compact, making them more convenient for certain types of photography.

The other options describe characteristics associated with variable lenses or features that may not necessarily apply to fixed lenses, thus differentiating them from the definition of a fixed lens.