US Night Vision Corporation has a reputation as a leading manufacturer and distributor of the latest and highest quality night vision and tactical equipment that is known world wide. Their dedication to customer service, satisfaction and support is exemplary and sets an extremely high standard for the entire industry. Whether you're looking for body armor, a thermal imaging weapon sight, or a hands-free night vision goggle, US Night Vision has a huge selection for you to choose from.
The USNV-221 is a high quality dual-tube/dual-eye night vision binocular. It offers excellent depth perception via true stereoscopic night vision imaging. The 221B is manufactured in the USA and utilizes high quality 2nd generation Photonis-DEP SHD-3 Mil-Spec intensifier tubes (45-51 lp/mm). The unique optical design of this NVD eliminates the need for interpupillary adjustment. It's compact and lightweight making it easy to transport. The sight picture is extremely bright and crisp, thanks to the special multicoated optics. This is a reliable and versatile high powered night vision optic, with the features you need to get the job done.
There are many different variables that affect the distance that one can see with a night vision device, among them the object's size, the level of details being sought from the object and the conditions of observation. Night vision devices detect much further under a full moon and clear skies than they will under a new moon and cloudy skies. Many different formulas are used to determine the statistic of maximum viewing range and this varies by manufacturer, so ultimately the generation of the intensifier tube is much more relevant than any quoted statistic when determining the maximum viewing range.
All night vision devices sold by B&H have mechanisms in place to protect the intensifier tube from a sudden burst of bright light, but this does not mean that bright light doesn't damage the device. No matter what, bright light in any form is not good for the longevity and performance of image intensifier tubes.