MO-21 is a compact, rugged scope that provides good quality night viewing with many features to boot. Utilizing hard plastic for its outside body, the MO-21 provides glass optics for high light transmission. The six element, infrared sensitive glass front lens system and glass three-element eyepiece allows a wide field of view with excellent clarity. And a powerfull infrared illuminator gives total darkness capability.
Camera adaptable, the MO-21 gives everyone a chance to become a nightvision photographer at an affordable price. The front lens is removable and C-mountable, giving you the option to place any lens on the front.
There are many different variables that effect the distance that one can see with a nightvision device, among them the object's size, the level of details being sought from the object and the conditions of observation. Nightvision 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 nightvision 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.