Light Art: light art

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Important Pointers!

What is an Exposure ?

It can be explained as the quantity of light allowed to act on a photographic material; a product of the intensity (controlled by the lens opening) and the duration (controlled by the shutter speed or enlarging time) of light striking the film or paper (darkroom or in the color-lab).

Since both the aperture and shutter speed control amount of light reaches the film for a exposure, there is a very strong relationship between the two:

The aperture (how big or small the lens diaphragm inside a lens opens up) allows different amount of light falls onto film through the lens that attached on your camera body and;
The shutter speed (the shutter curtain - duration and how long it opens up to absorb the amount of light falls onto film);

Although mechanically it differs in function and operation, but the objective is the same - both control and regulate light reaching the film plane to provide a proper exposure.