Shutter Speed

Chapter Ten 

The camera shutter control the amount or length of time, which allow the light to reach the film or CCD. Adjustment of the speed (often expressed either as fraction of seconds or as an angle, with mechanical shutters) of the shutter to control the amount of time during which the imaging is exposed to light for each exposure. Shutter speed may be used to control the amount of light striking the image plane, “faster”  shutter speed (that is , those of shutter duration) decrease both the amount of light and the amount of image blurring from motion of the subject and/or camera.

In a still camera, the light of time that the shutter is open, exposing the film (analog) or CCD or CMOS sensor (digital) to light for a single image. In a camcorder, the shutter speed is the frame speed; for example, 24, 30 or 60 frames per second (fps).

Shutter speed can have a dramatic impact on the appearance of moving objects. Changes in background blurring are apparent from the need to adjust the aperture size to achieve proper exposure

Factors that affect the total exposure of a photograph include the scene luminance, the aperture size(f-number) , and the exposure time (shutter speed); photographers can trade off shutter speed and aperture by using units of stops. A stop up and down on each will halve or double the amount of light regulated by each; exposure of equal exposure value can be easily calculated and selected. For any given total exposure, or exposure value, a fast shutter speed requires a large aperture (smaller f-number, Similarly , a slow shutter speed, a longer length of time , can be compensated by a smaller aperture (large f-number)

Slow shutter speed are often used in low light conditions , extending the time until the shutter close, and increasing the amount of light gathered. This basic principle of photography the exposure is used in digital cameras, The image sensor effectively acting like film when exposure by the shutter.

Shutter speed or more literally exposure time , is measured in seconds, but often marked in reciprocal seconds. A typical exposure time for photographs taken in sunlight is 1/125^th of a second, typically marked as 125 on a shutter speed setting dial. In addition  to its effect on exposure, shutter speed changes the way movement appears in the picture . Very short shutter speed are used to freeze fast-moving subjects, for example at sporting events. Very long shutter speed are used to intentionally blur a moving subject for artistic effect.

Shutter speed to Arrest Movement

Adjustment to the aperture controls the depth of field, the distance range over which objects are acceptably sharp such as adjustments generally need to be compensated by changes in the shutter speed. The agreed standards for shutter speed are

1/8000 s

1/4000 s

1/2000 s

1/1000 s

1/500 s

1/250 s

1/125 s

1/60 s

1/30 s

1/15 s

1/8 s

1/4 s

1/2 s

1s 

In next chapter we talk about link between aperture and shutter speed how they work together . If you have any question regarding  Photography  just feel free to ask . So stay with us and like us on facebook