Telephoto IR-corrected vari-focal lens with 10 to 40mm focal length, 1/2" image size, F/1.4 - 360 iris range, DC auto iris operation, manual focus operation. This lens has 37.5° x 27.5°/9.2° x 7.0° 1/2” angle of view (wide/telephoto). High-resolution lenses are cost-effective solutions for sensors with a resolution of 720p or less.