Collection: Cameras

OTDAU software requires one camera, and optionally two, to detect and then track moving objects.  It provides for two types of hardware and software interface to cameras:

  • USB webcams which may be external to your computer or built-in
  • IP cameras by Ethernet connection thru a router or directly to your computer

Two cameras may be used to track and zoom in on an object that may be first detected in a direction that is much wider than the PTZ camera’s field of view (FOV).  Making the initial detection using a wide-angle fixed camera and handing off continuous tracking to the PTZ camera can make best use of both their capabilities.

When the general direction of interest is known, the selection of a single camera may hinge on its Field of View (FOV), shown as horizontal and vertical angles of view in the table below.

Another aspect of selection is the tradeoff between higher resolution and a PTZ function.  The OTDAU software can continuously track (center) a target while zooming in which effectively increases the number of active pixels, thus compensating for its lower un-zoomed resolution.  However, a fixed camera will not experience the motion lag of a PTZ camera and thus does a better job at tracking faster-moving objects.

Note also the difference in light sensitivity between these cameras.  In color mode, this will not be apparent during the day but may result in more granularity of the image in very dark conditions.

Each camera may be set to a “black and white” mode by accessing its Setting menus via a browser.  In Camera > Conditions > Day & Night and setting the profile to night.  This removes the IR cut filter and thus enhances the camera’s ability to image near IR wavelengths.  If the camera has an IR illuminator, it should always be disabled by setting its Mode to off in the Illuminator menu.

Because we need to image above the horizon, and not below it, UFODAP camera mounts orient the camera lens/dome up.  It is thus important that the camera stays waterproof in that orientation.  For that reason, UFODAP cameras have been selected among those with an IP67 rating:  Combined with their high-level water-ingress protection indicated by the second digit (7), IP67-rated enclosures are able to withstand waterhose and jet sprays and can sustain momentary water immersion in depths of 150mm to 1000mm up to 30 minutes maximum.

However, we have been assured by Dahua that the 4A425DBNR (the replacement for the 42212TNI camera) will stand up to extreem wet outdoor conditions even though it is rated as IP66.  Out experience with the 42212, also rated IP66, bears that out.

See the individual data sheets for each camera, available in the Downloads section of the website, for more details.


Comparison of UFODAS Camera Specifications
Dahua cameras tested and selected for UFODAS over competing brands and models due to:
  Best price vs performance
  Excellent light sensitivity and resolution
  Rugged enclosures and ability to maintain water-proof rating mounted dome-up
  5-year warranty
N53CB62 N85DF62 EBW81242 50232XANR 50432GBNR 5A825GANR
Image sensor 1/2.7-in 5MP  1/1.8-in 8MP  1/1.7-in 12MP 1/2.8-in 2MP 1/2.8-in 4MP 1/1.8-in 8MP
Effective pixels 2960x1668 3840x2160 4000 x 3000 1920x1080 2560x1440 3840x2160
Optical zoom none none none 32 x 32 x 25 x
Electronic shutter speed 1/3s - 1/100,000s 1/3s - 1/100,000s 1/3s - 1/100,000s 1/1s - 1/30,000s 1/1s - 1/30,000s 1/1s - 1/30,000s
FPS at max. resolution 20 30 25 60   30
Main channel resolutions 2960x1668 3840x2160 4000 x 3000 1920 x 1080 2560x1440 3840x2160
2688 x 1520 3072x2048 2880 x 2880 1280 x 960 2048x1536 2560x1440
2304 x 1296 3072x1728 2880 x 2160 1920 x 1080 2048x1536
1920 x 1080 2592x1944 2048 x 1536 1280x960 1920 x 1080
1280 x 960 2688x1520 1280 x 960
1280 x 720 2048x1536 1280 x 720
2304 x 1296
1920 x 1080
1280 x 960
1280 x 720
Sub Stream 1 resolutions 704 x 480 704 x 480 704 x 576 704 x 480 704 x 480 704 x 480
640 x 480 640 x 480 352 x 288 352 x 240 352 x 240 640 x 480
352 x 240 352 x 240 352 x 240
Sub Stream 2 resolutions 1920 x 1080 none 1280 x 960 1280 x 720 1280 x 720 1920 x 1080
704 x 480 704 x 480 1280 x 720
352 x 240
Color sensitivity 0.005 lux 0.004 lux 0.001 lux 0.005 lux 0.005 lux 0.005 lux
B&W (IR) sensitivity 0.0 lux, IR on 0.0 lux, IR on 0.0 lux, IR on 0.0005 lux 0.0005 lux 0.0005 lux
0.0005 lux, IR off 0.0004 lux, IR off 0.01 lux N/A N/A 0.0 lux, IR on
F1.6 F1.6 F2.8 F1.35 F1.35 F1.6
Pan-Tilt-Zoom control no  no  no  yes yes yes
Angle of View, Horizontal 111 deg 111 deg 180 deg 67.8 - 2.2 deg 61.6 - 2.1 deg 61.6 - 3.6 deg
Angle of View, Vertical 58 deg 59 deg 180 deg 36.7 - 1.3 35.1 - 1.3 35.7 - 2.0
Environment IP67 IP67 IP67 IP67 IP67 IP67
Temperature range, °C -40 to +60 -40 to +60 -30 to +60 -40 to +60 -40 to +60 -40 to +70
Power consumption, W 3.7 6.2 <12 10 10 12
Power with IR and heater, W N/A 7.5 N/A 16 16 21
N/S -- Not Specified N/A -- Not Applicable
** See individual camera data sheets for specification qualifiers
-- Cameras can simulataneously stream video from both the Main and Sub stream outputs
-- All cameras environmentally rated IP66 or IP67 (all weather)
-- All cameras have IR cut filters that can be selected for normal color or electronically removed for IR


7 products
  • Dahua 4A425DBNR camera
    Dahua 4A425DBNR camera
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  • Dahua 50232XANR camera
    Dahua 50232XANR camera
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  • Dahua 50432GBNR camera
    Dahua 50432GBNR camera
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  • Dahua 5A825GANR camera
    Dahua 5A825GANR camera
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  • Dahua EBW81242 camera
    Dahua EBW81242 camera
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  • Dahua N53CB62 5MP fixed lens camera
    Dahua N53CB62 5MP fixed lens camera
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  • Dahua N85DF62 camera
    Dahua N85DF62 camera
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