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copitlory8
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Why is a telephoto lens considered to have a longer focal length than that of single convex lens?
copitlory8 said:Why is a telephoto lens considered to have a longer focal length than that of single convex lens?
Telephoto lenses have a longer focal length than convex lenses, meaning they can zoom in on distant objects. Convex lenses have a shorter focal length and are used for wide-angle shots.
The focal length of a lens is measured in millimeters and is the distance from the lens to the sensor or film when the subject is in focus.
Yes, both types of lenses can be used for various types of photography. Telephoto lenses are often used for sports, wildlife, and portrait photography, while convex lenses are commonly used for landscapes, architecture, and street photography.
The focal length of a lens determines the magnification of the subject and the angle of view in the photo. A longer focal length will result in a narrower field of view and a more magnified image, while a shorter focal length will provide a wider field of view and a less magnified image.
One disadvantage of telephoto lenses is that they can be heavy and bulky, making them difficult to carry around for long periods. They also have a narrower depth of field, which can make it challenging to keep the entire subject in focus. Additionally, telephoto lenses tend to be more expensive than convex lenses.