In addition to their micro four thirds line, Panasonic has now also developed full-frame cameras and lenses. They have a partnership with Leica, which means that Panasonic uses the L-mount. The range of lenses for full-frame Panasonic mirrorless cameras is more than complete. In addition to proprietary lenses, there are other manufacturers who manufacture equally good lenses. When choosing a lens, consider the desired maximum aperture, focal distance, internal focus, and focal length.