sony pd 150/170 video cameras
You can view what you're recording in two ways:
Viewfinder lens - which is on the top of the camera and can be pulled up and out from its compartment.
LCD screen - which is on the side of the camera and can be pulled out. To do that you'll usually push an Open latch or button to release the LCD screen.
The LCD screen can then be rotated for better viewing.
Note: pulling out the LCD screen will deactivate the viewfinder, so you must use one or the other. The only exception is if you rotate the LCD screen 180 degrees so it is facing toward the front of the camera, in which case the viewfinder may be reactivated for viewing.