Mobotix
Mobotix MX-B237 lens for D1x/M2x/D2x (HS code 90021900)
Distant Tele lens B237 HD premium quality Focal length: 23.7 mm Aperture: f/1.8 Image angle (horizontal x vertical, on camera with 6MP sensor): 15° x 11° (up to 5MP resolution) and 17° x 11.5° (6MP resolution)