The Leica M7 was one of the first Leica cameras to require a battery, to operate the shutter. Hard to believe now, but much of the Leica range of film cameras were mechanical and functioned perfectly happily without any batteries. This meant of course that the shutter speed choices were limited, but never the less, the camera could continue to function through the toughest of environments. This was also the beginning of aperture priority for the Leica M range which took some of the hard work out of taking the photo and the legendary quiet shutter ensured photographs could be taken whatever the occasion. The 'new' built-in DX coding facility incorporated into the Leica M7 film camera, meant that the ISO didn't need to be set manually on the camera itself, but was automatically set by the camera reading the barcode on the film cannister. All in all a camera that broke the mold and set the M series on a new pathway to modernisation.