normal lens sentence in Hindi
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- An alternative form of the cat's eye retroreflector uses a normal lens focused onto a curved mirror rather than a transparent sphere, though this type is much more limited in the range of incident angles that it retroreflects.
- There were four new Hexanon lenses offered along with the F . The normal lens was a 52 mm f1.4 with a 49 mm filter thread ( a similar lens was offered later with a 55 mm thread ).
- Compression, long-lens, or telephoto distortion can be seen in images shot from a distant using a long focus lens or the more common telephoto sub-type ( with an angle of view narrower than a " normal lens " ).
- A lens is considered to be a " normal lens ", in terms of its angle of view on a camera, when its focal length is approximately equal to the diagonal dimension of the film format or image sensor format.
- However it becomes disadvantageous for wide angle photography as a wide angle lens for 135 film effectively becomes a normal lens for the DX format ( e . g . 28 mm x 1.5 = 42 mm 135 film equiv . ).
- Another result of using a wide-angle lens is a greater apparent perspective distortion when the camera is not aligned perpendicularly to the subject : parallel lines converge at the same rate as with a normal lens, but converge more due to the wider total field.
- A normal lens or " normal prime " is a lens with a focal length about equal to the diagonal size of the film or sensor format, or that reproduces perspective that generally looks " natural " to a human observer under normal viewing conditions.
- Another result of using a wide angle lens is a greater apparent perspective distortion when the camera is not aligned perpendicularly to the subject : parallel lines converge at the same rate as with a normal lens, but converge more due to the wider total field.
- A normal lens then, is one that renders a printed ( or otherwise displayed ) photograph of a scene that when held at'normal'viewing distance ( usually arms-length ) in front of the original scene and viewed with one eye, matches the real-world and the rendered perspective.
- For example, buildings appear to be falling backwards much more severely when the camera is pointed upward from ground level than they would if photographed with a normal lens at the same distance from the subject, because more of the subject building is visible in the wide-angle shot.
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