Shutter-release button
One of the very first things you need to learn as a new digital camera owner is to use the two-step shutter-release button correctly.
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Once this is done, you should ideally depress the shutter-release button slightly, hold the focus steady, compose the subject in the frame and push the shutter-release button to take the photo.
All you need to do is point the camera at the target, half press the shutter-release button and the lens will focus.
Press the shutter-release button once to raise the mirror, again to take photograph (shutter will be released automatically if shutter-release button is not pressed for 30 seconds after mirror up). Find out more.
Modern SLRs fire a pre-flash when you press the shutter-release button, right before actual exposure starts. Usually you'll not even notice this pre-flash. The std.
The camera focuses continuously while the shutter-release button is pressed halfway, tracking the subject in the center focus area.
Shutter Lag:
The delay that takes place between pressing the shutter-release button and the time a photo is actually taken. Shutter lag times vary from digital camera to digital camera. Often the less expensive the camera the longer the lag.
The delay that takes place between pressing the shutter-release button and the time a photo is actually taken. Shutter lag times vary from digital camera to digital camera.
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Firmly hold the camera in both hands, with your elbows pressed against your sides. While exhaling carefully, depress the shutter-release button.
To facilitate vertical-position shooting, this grip features extra shutter-release button, preview lever, electronic dials, AE-lock button, Green button and AF button.
With autofocus, a photographer can push the shutter-release button halfway down and it will focus on the object in the center of the frame, allowing for greater user control.
Instead, zoom in (or use your center-weighted metering feature to take a close-up reading) and take a reading directly from faces. Use your exposure-lock feature (on most cameras all you have to do is to hold the shutter-release button halfway down) ...
Fine. You only have three choices. So make up your mind and make sure that you see your subject — loud and clear! — in the viewfinder before your finger presses the shutter-release button.
Grip houses the shutter-release button which accepts cable release. Main on/off switch ...
Dual system: There is no such a thing as a "perfect" format. Each format has its own advantages and disadvantages.
 See also: Shutter, Focus, Subject, Camera, Image
  
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