1) Big image maker 
In photography and cinematography, a telephoto lens is a specific type of a long-focus lens in which the physical length of the lens is shorter than the focal length. This is achieved by incorporating a special lens group known as a telephoto group that extends the light path to create a long-focus lens in a much shorter overall design. The angle ...
A specialized camera lens that acts much the same way as a telescope does for the naked eye. The telephoto lens magnifies the objects being photographed and allows the camera to close-in on subjects that are far away. The sacrifice is perspective and loss of texture a image become flat
(from the article `photography, technology of`) Long-focus lenses are bulky, because they comprise not only the lens itself but also a mount or tube to hold it at the appropriate focal distance ...
A lens that makes a subject appear larger on film than does a normal lens at the same camera-to-subject distance. A telephoto lens has a longer focal length and narrower field of view than a normal lens and have a shallower depth of field than wide angle lenses. But it can do isolation of subject and have a longer reach without going near to the s...
[n] - a camera lens that magnifies the image
zoom lens noun a camera lens that magnifies the image
A long focal length which creates a narrow, but magnified view of an object or person.