Search results
Results from the WOW.Com Content Network
Popular exposure chart type, showing exposure values EV (red lines) as combinations of aperture and shutter speed values. The green lines are sample program lines, by which a digital camera automatically selects both the shutter speed and the aperture for given exposure value (brightness of light), when set to Program mode (P). (Canon, n.d.)
The shutter speed dial of a Nikkormat EL Slow shutter speed combined with panning the camera can achieve a motion blur for moving objects. In photography, shutter speed or exposure time is the length of time that the film or digital sensor inside the camera is exposed to light (that is, when the camera's shutter is open) when taking a ...
Canon NS (1939) New Standard. A Canon S without the slow shutter speeds; Canon J (1939) J stands for Junior a non-rangefinder model. Canon J II (1946) Similar if not the same as prewar cameras; Canon S (1946) Similar if not the same as prewar cameras; Canon S II (1946) A redesign with combined range finder and viewfinder functions – two windows
The ISO arithmetic speed has a useful property for photographers without the equipment for taking a metered light reading. Correct exposure will usually be achieved for a frontlighted scene in bright sun if the aperture of the lens is set to f/16 and the shutter speed is the reciprocal of the ISO film speed (e.g. 1/100 second for 100 ISO film).
When using rear-curtain flash (when the flash fires at the end of the exposure) and a slow shutter speed, the distinction between the main flash and the preflashes is more obvious. [5] Some cameras and flash units take more information into account when calculating the necessary flash output, including the distance of the subject to the lens.
A fast prime (fixed focal length) lens, the Canon 50mm f / 1.4 (left), and a slower zoom lens, the Canon 18–55mm f / 3.5–5.6 (right); this lens is faster at 18mm than it is at 55mm. Lens speed is the maximum aperture diameter, or minimum f-number , of a photographic lens .
Shutter speed timing is provided by both mechanical and electronic methods. In the manual exposure mode, the camera uses mechanical timing for the fast speeds (1 ⁄ 2000 – 1 ⁄ 125 s + X (flash synch, 1 ⁄ 90 s) and B) and electronic timing for the slow speeds (1 ⁄ 60 – 8 s).
For example, as of 2008, Nikon cameras allow one to set the maximum and minimum ISO sensitivities, and slowest shutter speed that will be used in automatic modes, [4] while Canon cameras will select within the fixed range of ISO 400–ISO 800 in Auto ISO mode. In Nikon cameras, the Auto ISO mode first adjusts the shutter speed, keeping ISO at ...