Cctv auto-iris varifocal len 1) image size (ccd type): 3.6 x 4.8mm (1/3") 2) focal length: 3.5 - 8mm 3) camera mount (flange back): cs 4) back focal length: 7.6 - 11.9mm 5) maximum aperture ratio: 1:1.6 6) zoom ratio: 2x 7) iris control method: d.D 8) iris range: f1.6-64 9) focus control method: manual 10) zoom control method: manual 11) field of view (d x h x v): 1/3" A) wide: 91.4 x 78.2 x 58.84fp B) tele: 44.8 x 36.7 x 28.1fp 12) minimum object distance: 0.3m 13) effective diameter: front 28mm, rear 38mm 14) application temperature range: -10 ~ 50fpc (14 ~ 122fpf) 15) comments (infrared): ir Size: »28 x 38mm Total weight: 44g