The built-in 4-9mm lens provides an adjustable field of view. The lens is adjusted from the exterior of the camera with a unique tool (included) to ensure that you are the only one that can change the focus.
Don't forget that the 7500 uses infrared technology allowing it to see up to 45 feet in total darkness!
Specifications: Sensor Type 1/3-inch Sony Super HAD™ CCD Lens Type 4~9mm varifocal - external adjustment Scanning System 2:1 Interlace Horizontal Resolution 480 TV Line Minimum Illumination 0 lux (IR on) S/N Ratio >45dB Built in Back Light Compensation Yes Electronic Shutter Speed 1/60 - 1/100,000 second Gamma Correction 0.45 Power Requirements Regulated 12V DC Power Consumption 120mA / 500mA with IR Video Output 1.0Vp-p(Sync, Negative), 75 ohms Video Connector Composite - RCA Operating Temperature 14º to 122ºF (-10º to 50ºC) Storage Temperature -4º to 140ºF (-20º to 60ºC) Dimensions 3.78"(H) x 4.72"(D) / 96mm(H) x 120(D)mm Weight 1.3 lbs / 600g
