Sony PMW-350K Operating Instructions Manual page 34

To raise up the viewfinder barrel
Push the clip on the bottom to release and flip up
the viewfinder barrel.
It locks at the 120-degree position.
Normally use it in the locked position.
Although you can open it farther from the lock
position, once return it to the closed position to
lock it at the 120-degree position again.
34 Attaching the Viewfinder
To detach the viewfinder barrel
1
Push the clip on the bottom to release.
2
Flip up the viewfinder barrel.
3
Slide the knob on the top to the opposite
side of the viewfinder barrel.
4
Detach the viewfinder barrel by
horizontally sliding it.
To reverse the display (image/text indication)
horizontally
By setting the MIRROR switch on the rear panel
of the viewfinder to L/R, you can reverse the
picture and other information displayed in the
viewfinder horizontally.