A telephoto lens is a type of long-focus lens that brings distant subjects closer with the use of long focal lengths. It is a specific type of lens in which the physical length of the lens is shorter than the focal length. Telephoto lenses are used for a variety of purposes in photography, including:

• Wildlife photography: Telephoto lenses are ideal for photographing shy wildlife, as they allow photographers to take shots that look like they were just a few steps away from the subject when really they were some distance away.

• Portrait photography: Portrait photographers often use telephoto lenses to capture their subjects faces in a more flattering way.

• Sports photography: Telephoto lenses are great for capturing fast-paced action that you cant get close to, such as motorsport and flying events.

• Landscape photography: Telephoto lenses allow photographers to isolate details far more easily than a medium or wide-angle lens, making them ideal for capturing small details in landscapes.

• Cityscape or mountainscape photography: Telephoto lenses are great for emphasizing and bringing faraway subjects closer, from people to wildlife to mountains.

Telephoto lenses also have a unique way of showcasing the world, which may be ideal for your photos. They can be used to create a shallow depth of field, which isolates the subject and makes it stand out from the background. Additionally, telephoto lenses can compress the relative size of the subject to the background, making the background look bigger and closer to the subject.