2MP, Turbo HD Hikvision DS-2CE79D0T-IT3ZF, VF lens, EXIR IR 70m

What is varifocal lens of a camera?

Cameras couldbe divided into two types according to the typeoflenses – cameraswith fixed lensand cameras with varifocal lens.

Camera with varifocal lens is that camerafor video surveillance, whose lens allows to made additional, manual zoom and focusafter installation of the camera. The specific type varifocal lens is marked in millimeters (e.g. 2.8-12 mm).

This means that depending on the manual setting of  lens, the width of the view angle in the horizontal will be of 80-83 degrees (maximum at 2.8 mm) to about 30 degrees at the 12 mm lens adjustment.

Cameras with varifocal lensesaremost commonly usedand mounted on a pointsof thesystem for video surveillance,that require to monitor specific object or a certain perimeter.

An example of a situation where it is recommended to mount camera with this type of lens: you have to monitor flow of people and / or vehicles passing through the portal / barrier / entrance, but the situation does not allow the assembly to be less than 10-15m. In this case, mount the camera with varifocal lens, even at distance of 15 meters from the monitored  area, you can manually zoom in and make fine focus adjustmenttoo.

Product application in video surveillance systems: use of the product

In mind possibilities of shooting in night mode at distances up to 20-30 meters, manageable, varifocal lens from 2.8 to 12 mm, and the highest HD resolution in the model HD-TVI Hikvision DS-2CE56C5T-VFIT make it a preferred model in building systems for video surveillance in shops, non-stop shops, playgrounds for scrap, schools, private homes and residential entrances,blocks. It is because of the capabilities of the lens and its management HD-TVI camera HD-TVI Hikvision DS-2CE56C5T-VFIT has been often chosen by our customers  for surveillance of private vehicles, office parking lots and garages.

Camera

• Image Sensor: 1/3" Progressive Scan CMOS
• Signal System: PAL/NTSC
• Effective Pixels:              2MP
• Min. Illumination:           0.001 Lux @(F1.2,AGC ON), 0 Lux with IR
• Shutter Time:    1/50(1/60)s to 1/50,000s
• Lens:     2.8-12mm @ F1.4
• Angle of view: 78° - 28°
• Lens Mount:      M12
• Adjustment Range:        Pan: 0 - 355°, Tilt: 0 - 90°, Rotation: 0 - 355°
• Day& Night:       IR cut filter with auto switch
• Video Frame Rate:         720p@50fps/720p@60fps
• HD Video Output:           1 Analog HD output
• Synchronization:             Internal Synchronization
• Video Output: 1Vp-p Composite Output (75Ω/BNC)
• S/N Ratio:           More than 62 dB
• Up the Coax:     Support

Menu

• Auto Gain:          Low/Middle/High/Off
• D/N Mode:        Color/ BW/ EXT
• Auto White Balance:      Auto / Manual
• Private Mask:    On/Off, maximum 8 zones
• Motion Detection:          On/Off, maximum 4 zones
• Language:           English/Chinese
• Function:            Digital Wide Dynamic Range, 3D Digital Noise Reduction, Sharpness, Brightness, Digital Zoom, Mirror

General

• Operating Conditions:   -30 °C ~ 60 °C (-22 °F ~ 140 °F)
• Humidity 90% or less (non-condensing)
• Power Supply: 12 V DC±10%
• Power Consumption:    Max. 6W
• Weather Proof:               IP66
• IR Range:            Up to 50m
• Dimension:        φ130.54 × 93.24 mm (φ5.14” × 3. 67”)
• Weight:               380 g (0.84 lb)