Vanguard QS-52 quick release plate comes with a standard 1/4" male
camera screw thread, and also a locating pin for attaching to your
camera or spotting scope.
more than one quick-release plate allows you to use more than one camera
with your tripod, without having to constantly screw and unscrew plates
from the base of your camera. Simply leave a quick-release plate on each
camera (or zoom lens attachment ring), and you'll be able to switch
between cameras in an instant.