Some digital cameras allow you to set these controls as if you
had a fully automatic 35mm SLR. There are two kinds of cameras you may run into with this
capability:
?– Point-and-shoot Most point-and-shoot digicams that include manual settings for
aperture and shutter speed require you to use the LCD display to make onscreen menu
changes. The camera shown in the following illustration, for instance, uses a pair of
buttons on the right side of the LCD display to adjust shutter speed and another set of
buttons on the bottom of the screen to change the aperture settings. It isn??™t hard to do,
but you need to remember to first set the camera to its Manual Exposure mode, and then
remember which buttons do what for fine-tuning the exposure.
?– D-SLR Some digital cameras??”Digital SLRs, mainly??”use traditional SLR-style
controls for making manual adjustments to exposure. Specifically, you can turn
the aperture ring on the lens to change the f/stop or use a control on the camera to
accomplish the same thing, as shown in the following illustration. Shutter speed
is likewise affected with a dial on the camera body, and you can look through the
viewfinder to keep tabs on the setting.
CHAPTER 3: Understand Exposure 53
To set exposure manually, you must choose a shutter speed and aperture combination that
will properly expose your scene at a given ISO.
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