A digital camera sensor is, basically, its film. When you take a photo, the sensor is exposed to light and other components in the camera record what it sees. There are many, many types of camera sensors and it would be wasteful to compare every last one, but there are a few you should know about. read more
It’s a good idea to experiment with those controls and gain experience before you spend big bucks on a digital SLR. Look for a camera with traditional buttons and dials for manual controls for a couple of reasons: It will make using those same controls on a DSLR more intuitive, and touchscreen manual controls just aren’t ready for prime time yet. read more