10 Feb '18, 11am

Whether you own a film camera and a digital camera, they both essentially are light-tight boxes. There is a lens...

Whether you own a film camera and a digital camera, they both essentially are light-tight boxes. There is a lens...

Whether you own a film camera and a digital camera, they both essentially are light-tight boxes. There is a lens at one end that gathers the light and focuses it on a sensitive surface at the other end, thereby reproducing an image. In the past, film provided the sensitive material, and today in a digital camera, the sensitive surface is a sensor, most commonly a CCD or CMOS type, that has millions of tiny photosites arranged on it in a regular pattern known as the sensor array. All cameras have some way of controlling the amount of light coming in, either through a hole (the iris) that can be set to different sizes (the aperture), or by exposing the sensor for a specified period of time controlled by the shutter speed. On the sensor, each photosite in the array is, in effect, tiny light meter that produces an electrical signal. The strength of the signal depends on the am...

Full article: http://sops.sg/digital-camera-record-image/

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sops.sg 22 Feb '18, 12am

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