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Day/Night Speed Dome Camera STC-3940 with 22x lens

  • 1 /4" SONY EXview HAD CCD
  • Removable IR Cut Filter
  • 580 TVL Resolution
  • Variable pan/tilt speed from 0.1°/sec to 380°/sec
  • Built-in 22x zoom lens
  • 16 Scan modes
  • Up to 240 Presets
  • 8 Preset Tours
  • 8 Patterns up to 500 sec
  • 8 Privacy Zones
  • RS-485/422 control interface
  • 16 Sectors
  • 8 Alarm Inputs, 4 Relay Outputs
  • Wide Dynamic Range (WDR)
  • 2D/3D DNR
  • Frame Integration mode
  • Built-in lightning protection circuitry

The STC-3940 is ideal for video surveillance systems, requiring efficient object tracking. Use of optional thermo-insulated housing allows wider operating temperature range of up to –45° … +50° C.

General Features and Capabilities
The STC-3940 is equipped with 22x zoom lens. It provides 360° pan (continuous pan rotation) and –10° to 190° tilt (with AutoFlip). You can set up to 240 presets, configure up to 8 patterns (total 500 sec) and up to 8 preset tours, and create up to 8 privacy zones. Camera pan speed between presets can reach 380°/sec.

Operation in Low Light
In low light environment, the camera can activate its Frame Integration mode. In this mode, exposure time is increased according to user-defined ratio. Electronic shutter speed is automatically adjusted, depending on the quantity of light reaching the image sensor.

Built-in Lightning Protection Circuitry
To avoid camera failure as a result of lightning strike, the STC-3940 is equipped with the built-in lightning protection circuitry, both on power and video lines.

Effective Noise Reduction Mechanisms
The STC-3940 uses 2D and 3D DNR noise reduction mechanisms that reduce image noise in dim light. In addition to better visual perception, it allows to save DVR disk space when recording video. 2D DNR uses directional noise reduction filter, while 3D DNR utilizes time filter analyzing adjacent frames and eliminating distortion and most noises in the resulting image.

Specifications of the Smartec STC-3940 



Camera Type:

Day/Night Speed Dome

Image Sensor:

1/4" SONY EXview HAD CCD

Picture Elements:

752 (H) x 582 (V)

Horizontal Resolution:

580 TVL


f=3.9-85.8 mm, viewing angle from 49.5° to 2.4°

Removable IR Cut Filter:



22x optical; 16x digital

Minimum Scene Illumination:

1.0 Lux/F1.6 (Color, normal shutter speed)

0.02 Lux/F1.6 (Color, Frame Integration); 0.002 Lux/F1.6 (B/W, Frame Integration)

S/N Ratio:

>52 dB (AGC OFF)


360° (continuous rotation)


–10° ~ 190° (with AutoFlip)

Pan/Tilt Speed:

0.1-90°/sec; maximum: 360°/ sec (Turbo mode); Preset: up to 380°/sec

Pan/Tilt Accuracy:


Preset Call Time:

0.75 sec

PTZ Control:

RS-485/422, 2400-38400 b/s

Alarm Inputs/Outputs:

8 IN (NO/NC) / 4 Relay OUT (NO/NC)

Input Power:

24 VAC (18-30 VAC) / 24 VDC, 1A

Power Consumption:

Max. 20 W

Operating Temperature:

0° C to 50° C (in STB-C302-SH enclosure: –45° C … +50° C), 0-90%, noncondensing


1.2 kg

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