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2.  OVERVIEW

 

 

 

The day / night binocular BDN 7x50 is an observational 

optical-electronic device, intended for examining objects and 
orientation in both day and nighttime or under twilight conditions. The 
unit utilizes 2 (two) image intensifiers, which amplify available 
moonlight, starlight or synthetic light. The binocular was designed to 
be easy in use and provide many years of operation. 

 
Some of the typical activities where the BDN 7x50 Day / Night 
Binocular can be useful: 

 

 

law enforcement 

 

wildlife observation 

 

security 

 

search and rescue  

 

hunting 

 

 

 

Features 

 

 

Daytime channel provides clear observation through high quality 
glass optics; 

 

Nighttime channel comprises two image intensifiers, one for each 
eye, thus providing stereo vision; 

 

Built-in infrared illuminator allows observations in total darkness 
(i.e. basement, cave or dark room); 

 

Independently adjustable eyepieces; 

 

Inter-pupilary distance adjustment;  

 

Lightweight and comfortable; 

 

Soft rubberized foldable eyepieces make the viewing more 
comfortable for glass wearers; 

 

Water-resistant; 

 

Works with standard AA batteries. 

 

  

Adjust the focus and interpupillary distance as was described in 
paragraph 6.2. In case of insufficient lighting when observing an 
object, which is located not far from you, turn on the infrared 
illuminator by pressing and holding the ‘IR On’ button (11). As 
soon as the ‘I/R On’ button is released the infrared illuminator 
turns off.   
     

Note:

  The illuminator lights on only if the unit has been 

already switched on by the button (7). 

     Note: 

If you look directly at front of the binocular when I/R 

illuminator is on it appears as a red dot at a size of a lit cigarette. 
The illuminator can be also detected using night vision device. 
Therefore, if you need to remain undetected, use the illuminator 
with caution. 
     

Note: 

The unit automatically turns off after few minutes. This 

feature can be used to economically utilize the batteries power by 
periodically switching on and off the device during operation. 
    If brightness of the screen decreases, replace the batteries. Put 
protective lens caps back on the lenses after operation. If you don’t 
intend to use the device during long time remove the batteries 
from the battery compartments to avoid any damage of the device 
in case of occasional leakage of electrolyte from the batteries. 

 

 

7. TROUBLESHOOTING 

 

The binocular does not work

 

Check if the batteries are installed properly. 
Check the charge of the battery. Replace if they are weak.

 

 
The image does not appear in focus. 
 

Bring the inspected object to the center of the image. Turning the 

eyepieces (8) adjust the focus trying to achieve the clearest image 
on the screen. Repeat the

 

steps of focusing if necessary 

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