In "Full Manual" mode, you can set both the aperture and the shutterspeed. This gives you ultimate control over the exposure. This can be useful to ensure that the same exposure is used for a sequence of shots or when shooting in special circumstances, e.g. shooting in direct sunlight. Higher-end prosumer digital cameras and all digital SLRs feature full manual exposure. When in full manual exposure mode, the camera will often display a simulated exposure meter which will indicate how far over- or underexposed the image is compared to the exposure value calculated by the camera's metering system. Prosumer digital cameras with live LCD preview will often simulate the effects of the exposure on the live preview.
This article is written by Vincent Bockaert,
author of The 123 of digital imaging Interactive Learning Suite
Click here to visit 123di.com