This $20 phone app gives you wifi monitoring and focus control for your camera! It also sports several other video features including vector scopes, waveforms, focus peaking, anamorphic de-squeezing and much more!
Check out the Field Monitor App here.
This is probably the most affordable way to use your phone as a camera monitor AND get focus and exposure features like these on a Panasonic or Sony camera.
This video was not paid for by outside persons or manufacturers.
No gear was supplied to me for this video.