Re: 35mm vs arri alexa

An electrically ungrounded lens is when the rear barrel of the lens you just tossed on your television camera fails to make electrical contact to the body of the camera. AC hums, radio signals making interference, and occasional static tend to pour into the preamplifier by the photosurface. It usually happens when someone puts a film camera lens on a TV camera so the paint on the lens mount insulates the lens until you scrape a place to reach metal.