by David Tong
The whole technical aspect of photography is about exposure. To put it simply, how light is harnessed through a lens and projected as an image onto a films surface or a camera sensor to produce an image.
While the proper application of exposure control is not an end-all basis for a good photograph, it does benefit the photographer to know how an exposure is made and how you can control the exposure to produce the images that you want.
With todays advancement of computer chips in cameras, it has become easier to achieve a proper exposure in most scenes that users will enounter. The amount of presets in most consumer pocket cameras are so abundant, it has become quite tricky NOT to get a proper exposure in most cases with automated cameras. However, most camera users think this is some sort of computer magic that the camera knows what to do when you change your setting from Beach to Fireworks to Winter, for example.
The reality is, the camera manufacturer merely made some preset adjustments to the fundamental parameters of obtaining an exposure - namely, shutter speed, aperture opening, and film/sensor sensitivity! The uninformed user simply doesnt know this.
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