You can switch the size of the image from wide-angle to telephoto position
When the power is turned on, the lens is set to the wide-angle position
Every time the wide-angle /telephoto button is pressed, the position changes between wide-angle and telephoto.
Wide-angle Position (38mm) - this give you a wide field of view, suitable for shooting landscapes, group pictures etc.
Telephoto Position (80mm) - this makes the images larger, suitable for shooting portraits, etc.