Sony ILCA-77M2 - Manual (Page 38)

When carrying the camera with a lens attached, hold both the camera and the lens firmly.
Do not hold the part of the lens that is extended for zoom or focus adjustment.
[22] How to Use Preparing the camera Attaching a lens
Removing the lens
Set the power switch of the camera to OFF before you remove the lens.
1. Keep pressing the lens release button
(A) and turn the lens in the direction of the arrow until it
stops.
2. Attach the lens caps to the front and rear of the lens and the body cap to the camera.
Remove any dust from the caps before attaching them.
[23] How to Use Preparing the camera Attaching a lens
Attaching the lens hood
We recommend that you use the lens hood to prevent light outside the shooting frame from affecting the
image.
1. Match the shape of the lens hood mounting part and lens head, and turn the lens hood clockwise
until it clicks.