ATN Night Arrow4-2I

ATN Night Arrow4-2I
The ATN Night Arrow4-2I viewer is part of the Night Arrow series. It has a fourfold magnification for the longer distances and provides you with excellent observation, spotting and target performance so you will always be accurate. Automatic Brightness Control (ABC) automatically adjusts the brightness of the image so this viewer offers the best picture quality in all lighting conditions. ABC also protects light-sensitive parts in the tube against overexposure. If the visor is extremely exposed, the viewer will be automatically turned off to prevent damage to the system.

Swift Arrow Series
The ATN Night Arrow series offers a variety of solutions in different price ranges. Equipped with the best optics, tubes and excellent performance, this series is one of the best available on the commercial market. The viewers are battery-powered. A full battery lasts up to 30 hours and, using the Low Battery Indicator, the viewer alerts you when it is time to change the battery.

Gen 2I Technology
Second Generation night vision. In a night rifle scope the image amplifying tube is the metaphorical beating heart and this also applies to the ATN Night Arrow 4-2I. The difference between a first and a second generation unit is mainly the addition of a micro-channel plate, or MCP. The MCP works as an electron amplifier and is placed directly behind the photocathode. A photocathode is a negatively charged electrode in a night vision and has a photosensitive coating. From the moment light strikes it, the absorbed energy generates an emission of electrons. This process is caused by a photoelectric effect. Simply put, the MCP gives the electrons an extra push so that the second generation night vision provide a brighter and sharper image.

Click Value or MOA
The vertical height adjustment ensures that the target in the viewer coincides with the spot where the bullet strikes. The flight of the bullet is affected by gravity in an arc orbit effect, the rifle scope follows a straight line. To compensate for this effect, the viewer has a turning wheel for adjusting the height. Usually, the viewer set to a certain distance, e.g. 25m. The adjustment wheel goes with clicks, so the adjustment per click is indicated as click value. The movement of the target point caused by one click of the dial is expressed in minutes (of degrees). A minute is 1/60th of a degree. In English this is called "Minute of Angle" or MOA. On a viewer it is often indicated what one click means for that specific model: 1/4 MOA, 1/8 MOA, so 1/240th or 1/480th of a degree.

A little math
The distance to your goal is the radius of a vertical circle. With a distance of 10m, the circumference of a circle is 628m (2 x pi x r). One degree displacement is 628:360 = 1.74m, one minute is 1.74:60 = 0.029m or 2.9cm. Divide this number by the amount of MOA, e.g. 1/4, and you have the vertical displacement of the target per click.

Specifications

• Gen. 2I Night Vision Technology
• IR450 detachable infrared beamer for use in total darkness
  
• Dioptre adjustment from -4 to 6
  
• Resolution 40-45lp/mm
  
• 4x Zoom
• Power supply: 1x 1.5V AA Battery
  
• 1/4 MOA
  
• Functional in temperatures from -40 to +50°C
  
• Temperature resistant from -50 to +70°C
  
• Delivery time: 3 to 4 weeks
  
• 100% Waterproof
  
• Proshield lens coating
  
• Includes batteries, carrying bag, lens cap and cleaning cloth