Konica Minolta TC-X - Manual (Page 5)

1. Changing the lens Attaching the lens:
Align the red dot on the lens barrel with the red dot (22)
on the camera body and gently insert the lens barrel into
the camera. Grip the lens and turn clockwise until it
locks.
Removing the lens:
While the lens release button (25) is kept depressed, turn
the lens barrel counterclockwise until the red dots on the
lens and camera are aligned. Then remove the lens.
2. Inserting battery