Press and hold the shutter button halfway down

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The camera's autofocus and autoexposure meters begin to do their thing. In dim light, the flash may pop up if the camera thinks additional light is needed. Additionally, the flash may shoot out an AF-assist beam, emitting a few rapid pulses of light designed to help the autofocusing mechanism find its target. (The AF stands for autofocus.)

At the same time, the autoexposure meter analyzes the light and selects initial aperture (f-stop) and shutter speed settings, which are two critical exposure controls. These two settings appear in the viewfinder; in Figure 2-2, the shutter speed is 1/250 second and the f-stop is f/5.6. You also see the current ISO setting and the maximum burst rate. (Chapter 5 details shutter speed, f-stops, and ISO; see Chapter 1 for information about the maximum burst rate.)

When focus is established, the camera beeps at you, assuming that you didn't silence its voice via Shooting Menu 1. Additionally, the focus indicator in the viewfinder lights, as shown in Figure 2-3, and the dot inside an autofocus point starts to blink red. That blinking dot indicates which autofocus point the camera used to establish focus. Sometimes multiple dots blink, which simply tells you that all the objects within those autofocus areas are now in focus; for example, in Figure 2-3, all autofocus points except the leftmost one are red.

The autoexposure meter continues monitoring the light up to the time you take the picture, so the f-stop and shutter speed values in the viewfinder may change if the light shifts.

Focus light

Figure 2-3: The green light indicates that the camera has locked focus.

Focus light

Figure 2-3: The green light indicates that the camera has locked focus.

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Digital Camera and Digital Photography

Digital Camera and Digital Photography

Compared to film cameras, digital cameras are easy to use, fun and extremely versatile. Every day there’s more features being designed. Whether you have the cheapest model or a high end model, digital cameras can do an endless number of things. Let’s look at how to get the most out of your digital camera.

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