Voigtlander Ultra Wide-Heliar 12mm f/5.6 Aspherical M Mount Lens for Leica M - Black Voigtlander 12mm f/5.6 Heliar Lens - Front and Rear Lens Caps - Voigtlander 1 Year Warranty Focal Length: 12mm Aperture: Maximum: f/5.6 Minimum: f/22 Camera Mount Type: Voigtlander VM bayonet; compatible with all M-mount cameras and adapters Format Compatibility: 35mm Film / Full-Frame Digital Sensor