L135-3.5-M12 Description 3.5mm large aperture, low distortion M12 lens Specifications Focal Length 3.5mm Aperture f/1.8 Image Size 1/2.5" Angle of View (1/1.8") 90° x 78°  x 62° Mount Type M12 Minimum Object Distance 0.2m TV Distortion ≤1.7% Back Focal Length 5.9mm External Dimensions D=24mm L=21.7mm Net Weight 23g Rated sensor resolution 5M Dimensions