Focal Length (mm) 2.6~6.0mmRelaive Aperture 1.6Image Format 1/3" 4.8 x 3.6mmOperation Iris Auto (F1.6 ~ 360)Focus Manual (50cm~8)Zoom Manual Object Size at 50cm 2.6mm 1/3" 132.5 x 81.1cm 1/4" 81.1 x 55.4cm6.0mm 39.9 x 32.1cm 32.2 x 23.7cmOperating Temperature -20? ~ +70?Angular Field of View WIDE 134.6° x 105.8° x 78.0°TELE 59.2° x 47.4° x 35.6°Coil Drive - 190O Control - 850OEffective Lens Aperture Front f18.7mmRear f6.5mm Back Focal Length 6.0mmMetal Back...