The document outlines several key functions of a camera including zoom, which allows moving closer or further from a subject; focus, which is adjusted using a manual ring on the lens; iris, which controls the amount of light through an adjustable opening; white balance, which sets the color balance; and shutter, which controls exposure and improves sharpness. Other components mentioned are the mode switch, lens, main control dial, flash features, and focus mode switch.

1. Functions of a Camera
Zoom-Function that moves the point of view closer of further away
from the subject. The more zoomed in, the harder it is to keep the
picture steady.
Focus-Proffesional cameras usually have a have a manual focus ring at
the front of the lens housing. Turn the ring clockwise for closer focus,
anti-clockwise for distant focus.
Iris-This is an adjustable opening which controls the amount of light
coming through the lens. As you open the iris more light comes in and
the picture appears brighter.
White Balance-White balance means colour balance. It is the function
that tells the camera what each colour should be.
Shutter-The shutter can be used to help control exposure. The main
advantage is that individual frames appear sharper.

2. Mode Switch
Lens
Main Control Dial
Flash
Flash Button
Lens Release
Focus Mode Switch
Shutter Button