
Digital SLR sensors come in a number of different sizes, but the most common is the APS-C format. This is about half the area of a full-frame sensor or a 35mm film frame, and gets its name from the APS-C [...]
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Digital SLR sensors come in a number of different sizes, but the most common is the APS-C format. This is about half the area of a full-frame sensor or a 35mm film frame, and gets its name from the APS-C [...]
‘Megapixels’ is the the number of pixels on a camera sensor in millions. Each pixel on the sensor corresponds to a pixel in the photo. It’s the biggest selling point for digital cameras, though these days the sensor size is [...]

Canon’s new EOS 7D has an 18-megapixel sensor (not full-frame), 8fps continuous shooting speed and 1920 x 1080 full HD video, plus a new 19-point autofocus system. The video mode has full manual control, and the camera has an external [...]
The level of random variation in the pixels of digital photos. The pixels (photosites) on sensors record the levels of light falling on them as an electrical signal. However, there’s always a certain level of random background electrical activity which [...]

Different types of digital camera use different sized sensors. Ignoring specialised studio cameras, the largest are in full-frame digital SLRs, the next largest are in APS-C format SLRs and Four Thirds cameras, while the smallest are in compact cameras.
The physical [...]