Factors affecting exposure: exposure of the digital camera control

Digital cameras have come into the ordinary family and got the very consumers, but many people often as the photos out of the picture is not clear and "headache", this is a digital camera at the request of the exposure. Camera exposure on many common digital and common things, here's the exposure adjustment to talk about these "guidelines". The reason why sometimes despite shutter speed, light into digital cameras have come, and the average family are consumers, but many people often as the photos out of the picture is not clear and "headache", this is a digital camera at the request of the exposure. Camera exposure on many common digital and common things, here's the exposure adjustment to talk about these "guidelines". The reason why sometimes despite the shutter speed, Aperture, ISO speed is not the same, but the effect is basically the same shot? this is because the shutter speed, Aperture and ISO speed between the following relationship. Shutter speed doubles (for example, the shutter speed from 1/2 second transform into 1/4 seconds), lens light quantity will be reduced by half. Shutter speed used is a multiple relationship between both, 1 sec, 1/2 sec, 1/4 seconds, 1/8 sec, 1/15 sec, 1/30 sec, 1/60 sec, 1/125 sec, 1/250 sec, 1/500 sec, 1/1000 seconds in sequence. My usage of Aperture F value order 1.4, 2.0, 2.8, 4.0, 5.6, 8.0, 11, etc. Largely by the square root of 2 has increased by leaps and bounds. Moreover, the F value of each additional stalls, and shutter speed doubles, light quantity will be reduced by half. Why the F value of sequence is so erratic? this is due to the F value is the lens aperture, in addition to the numeric aperture. For example, the aperture value from 4 to 8, then the light through the aperture becomes half. When the light through the area is its diameter is directly proportional to the square, then 1/4. If you set the aperture by 4 into 5.6, light through the aperture is 1/2 square root, then the light through the area is the square root of 1/2 square, that is 1/2, the amount of light is reduced by half. ISO speed of commonly used numbers 100, 200, 400, 800. If you double the speed, half the amount even if the light is also able to use the same exposure to light. Now that most digital cameras are equipped with the "exposure compensation" function. Set the exposure compensation to + 1, means that the shutter speed to slow down, or aperture doubles. In fact, use the program mode, the camera is removed from the aperture and shutter speed to be adjusted in two ways, to make light of doubles. As mentioned above, by changing the shutter speed, Aperture, ISO speed, exposure compensation, will be able to control the exposure adjustment is. photos For many of the above appears, just remember they relate to each other, when in actual shooting flexibility.