The shutterspeed determines how long the sensor is exposed to light. Normally this is achieved by a mechanical shutter between the lens and the sensor which opens and closes for a time period determined by the shutterspeed. For instance, a shutter speed of 1/125s will expose the sensor for 1/125th of a second. Electronic shutters [...]
Archive for August, 2011
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Metering
August 22nd, 2011 
Andrei The metering system in a digital camera measures the amount of light in the scene and calculates the best-fit exposure value based on the metering mode explained below. Automatic exposure is a standard feature in all digital cameras. All you have to do is select the metering mode, point the camera and press the shutter [...]
Exposure Compensation
August 10th, 2011 Andrei The camera’s metering system will sometimes determine the wrong exposure value needed to correctly expose the image. This can be corrected by the “EV Compensation” feature found in prosumer and professional cameras. Typically the EV compensation ranges from -2.0 EV to +2.0 EV with adjustments in steps of 0.5 or 0.3 EV. Some digital SLRs [...]
Exposure
August 7th, 2011 Andrei The exposure is the amount of light received by the sensor and is determined by how wide you open the lens diaphragm (aperture) and by how long you keep the sensor exposed (shutterspeed). The effect an exposure has depends on the sensitivity of the sensor (ISO sensitivity). Accredited online photography schools can teach you more [...]
