Konica Minolta X21 User Manual (en)

The self-portrait mirror allows a self-portrait to
be taken without the need of the self-timer and
a tripod. 
Hold the camera at arms length. Center
yourself in the mirror next to the lens to point
the camera.
Press the shutter-release button partway
down to lock focus (1). When activated (p. 85),
the focus signal beeps to confirm focus. 
Press the shutter-release button all the way
down to take the picture (2). 
The mirror is a general pointing device
suitable when using the lens in the wide-angle
position. The actual framing of the image
depends on the distance between the camera
and subject, and the zoom position. A test
picture can be taken to confirm the zoom and
camera position.