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A simple photographic lens may be constructed using one lens element of a given focal length; to focus on an object at infinity, the distance from this single lens to focal plane of the camera (where the sensor or film is) has to be adjusted to the focal length of that lens. For example, given a focal length of 500 mm, the distance between lens ...
For example, for handheld use of a 35 mm camera with a 50 mm normal lens, the closest shutter speed is 1 ⁄ 60 s (closest to "50"), while for a 200 mm lens it is recommended not to choose shutter speeds below 1 ⁄ 200 s. This rule can be augmented with knowledge of the intended application for the photograph, an image intended for significant ...
Lens speed is the maximum aperture diameter, or minimum f-number, of a photographic lens. A lens with a larger than average maximum aperture (that is, a smaller minimum f-number) is called a "fast lens" because it can achieve the same exposure as an average lens with a faster shutter speed. Conversely, a smaller maximum aperture (larger minimum ...
An example of the use of f-numbers in photography is the sunny 16 rule: an approximately correct exposure will be obtained on a sunny day by using an aperture of f /16 and the shutter speed closest to the reciprocal of the ISO speed of the film; for example, using ISO 200 film, an aperture of f /16 and a shutter speed of 1 ⁄ 200 second. The f ...
For example, at a focal length of 125 mm on a 35 mm camera, vibration or camera shake could affect sharpness if the shutter speed is slower than 1 ⁄ 125 second. As a result of the 2-to-4.5-stops slower shutter speeds allowed by IS, an image taken at 1 ⁄ 125 second speed with an ordinary lens could be taken at 1 ⁄ 15 or 1 ⁄ 8 second with ...
Here, the camera is biased towards choosing wider apertures for narrow depth of field and fast shutter speeds, most useful with telephoto lenses. Shutter-priority AE. Here, the user selects the shutter speed and the camera chooses the correct aperture. Programmed flash AE. This is designed to work with the Speedlite 277T dedicated flash unit.
In particular, telephoto lenses are typically much shorter and may be lighter for equivalent focal length and aperture. However telephoto designs increase the number of lens elements and can introduce flare and exacerbate some optical aberrations. Catadioptric lens - catadioptric lenses are a form of telephoto lens but with a light path that ...
Many medium-format and most large-format cameras, however, have interchangeable lenses each fitted with a central shutter. A few interchangeable-lens cameras have a behind-the-lens leaf shutter. Large-format press cameras often had a focal-plane shutter. Some had both a focal-plane shutter (for lens interchangeability) and a lens with central ...
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