Yukon Advanced Optics, a world wide leader in the development and distribution of night vision and sporting optics, stay true to their one simple mission; to produce high quality optics at affordable prices. Their items are lightweight, compact, and quite durable. Extreme care is taken in the construction and design of each optic, and special attention is paid to the art and physics of optical science. This level of quality control ensures that each device is a joy to hold, use, and look through.
The Spirit 4x50 Night Vision Monocular allows you to see in complete darkness while stealthily moving through the night undetected; like a spirit. This NVD is distinguished by its small size, simplicity and light weight. This higher powered Spirit NVD gives you the ability to see further and observe more detail in the scene. High quality optics and a built-in IR illuminator give you the ability to explore a dark cave or the inside of a pitch-black building or any other dark place. The sturdy, rugged Spirit will provide you with hours of enjoyment. Now you can observe nocturnal animals in their natural environment or discover what else lurks in the dark without exposing yourself to the unseen.
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.