A telephoto lens is a type of camera lens designed to capture distant subjects with clarity. It has a long focal length, which allows photographers to zoom in on faraway objects without losing detail. This makes telephoto lenses popular for wildlife photography, sports events, and portraiture, where getting close to the subject may not be possible. These lenses can vary in size and aperture, affecting their performance in different lighting conditions. A common feature of telephoto lenses is their ability to compress the background, creating a pleasing bokeh effect. This characteristic enhances the focus on the subject, making it stand out in the frame.