Because many Blu-ray movies come in a 2.35:1 aspect ratio, which is wider than the projector's 16:9 aspect ratio, Panasonic's Intelligent LensMemory automatically detects and switches the lens and focus position.
This is a very fast camera in every respect (bar an occasional lag writing RAW files to memory) with a tack-sharp, super-fast lens, pleasingly fast autofocus, a great, bright screen, and rock-solid feeling controls that are right where your fingers need them to be.