For full control over the process of obtaining a digital image, it is necessary, at least in general terms, to imagine the device and the principle of operation of a digital camera.
The only fundamental difference between a digital camera and a film camera is the nature of the photosensitive material used in them. If in a film camera this is a film, then in a digital one – a photosensitive matrix. And just as the traditional photographic process is inseparable from the properties of the film, so the digital photoprocess largely depends on how the matrix converts the light focused on it by the lens into a digital code.
The principle of the photomatrix
The photosensitive matrix or photosensor is an integrated microcircuit (in other words, a silicon wafer), Continue reading
A good exposure is critical for quality photography. However, the essence of the exposure is extremely simple. Exposure is just the amount of light entering the photosensor. The process of shooting a frame is sometimes called exposure.
Exposure can be reduced, but can be increased. That, in fact, is all that you can influence. A smaller exposure makes the frame darker, a larger exposure makes it brighter. The lack of exposure is called underexposure, excess – overexposure.
Exposure is measured in exposure numbers or exposure levels (EV – exposure value). Changing the exposure by one step means changing the illumination of the frame by half. Continue reading