Sharper Images Tip #2: Use a Cable Release or Remote
If you have your camera set up on a tripod, when you push the shutter button to take a photo, you sometimes inadvertently create some unnecessary movement on the camera. It may not be much . . . but if you’re using a tripod, shouldn’t you eliminate camera shake?
The solution? Attach a cable release (also called a “remote switch”) to your DSLR. You can then press the button on the end of the cable release, not the shutter on the camera, and get rid of camera shake.
If you don’t have a DSLR or don’t want to carry around a wired remote, you can also get a very inexpensive wireless remote.
The Self Timer setting on your camera doubles as a wireless remote setting. Many wireless remotes such as the Canon RC6 allow for both instant shooting and a 2 second delay.
Just point the remote at the camera and the takes the picture!