In the off position, it blocks the shutter release button. Flash at ultrahigh exposure times. In addition to the regular 1/50 second sync speed, the M7 in conjunction with special Metz flash units can now flash at sync speeds up to 1/1000 second. In this mode, the settings of the exposure and the flash are made manually. Use flash creatively. In conjunction with a specially equipped flash unit, the M7 can also be triggered by the second shutter curtain. The advantage is a natural pictorial rendition, for instance, with long exposures and fill-in flash. Prevent faulty exposures. There are two options of setting the film speed: manual and automatic (with DX coding). This eliminates faulty exposures that result from setting wrong ASA film speeds. An override feature of +/-2 f/stops is available for exposure corrections in the automatic exposure mode.

Six is the top protection level against solid bodies, meaning the CVC-6990 is certified dust proof. Eight is the top protection level against water, meaning this unit will protect your camera for long periods of immersion under pressure. The CVC-6990 features a built-in electronic auto-iris for automatic light compensation, and has a shutter speed ranging from 1/60 to 1/100,000 of a second. This unit runs on 12-volt DC power, and has an operating temperature of five- to 131-degrees Fahrenheit. Technical Features: Sensitivity: minimum illumination of 0. 01 Lux Effective pixels: up to 512 x 492 Protection rating: IP68 Horizontal resolution: 420 TVL Dimensions: approximately 1-inch diameter x 4. 75-inch depth Designed for use under trying circumstances, the Lorex CVC-6990 camera deserves serious consideration as a great addition to any surveillance system subjected to extreme environmental conditions. Quick and easy to install with a standard BNC (Bayonet Neill-Concelman, RF-type) to RCA video output connector, this Lorex camera comes completely assembled and ready to use and is dependable even in low-light conditions. User's should note that the CCD sensor may become permanently damaged if exposed to long hours of direct sunlight or halogen light, so the camera should not be mounted or pointed directly at the sun or other bright-light sources. Also, while IP68 certified, this camera was not intended for use in salt water or water with chemicals, such as the ocean or a swimming pool. About Surveillance Camera Technical Features Lux rating is the measurement used to indicate how sensitive a camera is to light, and stands for the level of light reflected off a piece of paper by a candle from one meter away. Thus a sensitivity of three Lux would mean a camera could generate an acceptable picture of a piece-of-paper-sized object that was illuminated by the equivalent of three candles from one meter away. The lower the Lux level, the better the camera's ability to work in low-light conditions. The camera's resolution should be greater than or equal to the resolution supported by the system's recorder or monitor. The S/N, or signal to noise ratio, is an important measure of a camera's quality. A poor camera, low-light conditions or poor wiring causes "noise" which consumes processing power and disk space. A camera with a wide dynamic range is ideal, especially for recording areas in which both indoor and outdoor light are present. CCD (charge-coupled device) sensors provide high-quality images that are less susceptible to noise. CMOS (complimentary metal-oxide semiconductor) sensors offer less image quality, but are usually more cost-effective and energy efficient. About Surveillance Camera Housings Most video surveillance systems can be deployed for outside use when a proper camera housing is used. Key features for housings are a blower/fan to keep the camera cool in the summer, and a heater for the cold-weather months and to keep the glass from fogging up. Most housings can accept many types of security cameras. An outdoor dome housing is used for external mounting when tamper resistance or pan/tilt functionality is desired. What's in the Box CVC-6990 camera, power supply, 100-foot extension cable, mounting bracket, and RCA/BNC connector.