The Functions - The Front

Canon EOS 20D DSLR
Image from http://www.all-things-photography.com/images/front-of-20d.jpg

First of all on the camera there is the alignment for the lens (#1). This allows you to place the lens onto the camera and twist and lock it in place. Second there is the pop up flash button (#2), when you press this button the flash will come up. But for modes like "Full Auto" the flash will activate automatically letting the camera decide whether to use it or not. Third there is the lens release button(#3), when you press this in, it unlocks the lens and allows you to twist and take off the lens. Fourth  is the depth of field preview (#4), this button determines how much of the image will be in focus. This button closes the aperture to give you a idea through the view finder of what would be in focus.

Next is the lens contacts (#5) this little notches in the camera connect to the lens to allow the camera to auto focus and to change other settings. Next is the mirror (#6) this mirror allows you to see through the view finder and find out what you would be taking a picture of. Next is the grip (#7) this is where you hold the camera, the grip usually has some kind of rubberized coating for better grip. Next is the shutter release button (#8), this button takes your picture, when you press the button half way it allows the camera to auto focus. Last is the pop up flash (#10). Most cameras have a built in flash, when on auto mode the flash will pop up automatically.