TELEPHOTOLENS

Telephoto lens

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 of view and other effects of long-focus lenses are the same for telephoto lenses of the same specified focal length. Long-focal-length lenses are often informally referred to as telephoto lenses although this is technically incorrect: a telephoto lens specifically incorporates the telephoto group.

The above text is a snippet from Wikipedia: Telephoto lens
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telephoto lens

Noun

  1. A lens having a long focal length which produces a magnified view of distant objects.
  2. A lens which produces a magnified view of distant objects and which is sufficiently compact to have a physical length shorter than its focal length (as distinct from a long-focus lens).


The above text is a snippet from Wiktionary: telephoto lens
and as such is available under the Creative Commons Attribution/Share-Alike License.

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