Sony DSLR A550 Instruction Manual - Page 61
Shooting an image the way you want it (Exposure mode), Shooting images
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Shooting an image the way you want it (Exposure mode) With a single lens reflex camera, you can adjust the shutter speed (how long the shutter is open) and aperture (the range that is in focus: depth of field) to enjoy a variety of photographic expressions. Adjusting the shutter speed and aperture not only creates the photographic effects of movement and focus, but also determines the brightness of the image by controlling the amount of exposure (the amount of light the camera takes in), which is the most important factor in photo shooting. Changing the brightness of the picture by the amount of exposure Shooting images Amount of low high exposure When using a faster shutter speed, the camera opens the shutter for a shorter time. This means less time for the camera to take in light, resulting in a darker picture. To take a brighter picture, you can open the aperture (the hole through which the light passes) to some extent in order to adjust the amount of light the camera takes in at one time. The brightness of the picture adjusted by the shutter speed and aperture is called "exposure." This section will show you how to adjust the exposure and enjoy various photo expressions by the use of movement, focus, and light. When you turn the mode dial, the explanation of the selected mode and methods of shooting are displayed on the screen (Help Guide disp.). You can clear the Help Guide (page 134). 61