SUPER TELE LENS B500 ¥ HD PREMIUM QUALITY ¥ FOCAL LENGTH: 50 MM ¥ APERTURE: F/2.5 ¥ IMAGE ANGLE (HORIZONTAL X VERTICAL): 8¡ X 6¡ (UP TO 5MP RESOLUTION) AND 9¡ X 6¡ (6MP RESOLUTION) ¥ FOR MOUNTING THIS LENS ON THE M2X, THE EXTENDED REPLACEMENT LENS COVER IS NEEDED (MOBOTIX ACCESSORY: MX-M24M-OPT-LCGL)