The M49 Spotting Scope, also known as the M49 Observation Telescope, is a multipurpose scope system used primarily for long range
marksmanship
A marksman is a person who is skilled in precision shooting using projectile weapons (in modern days most commonly an accurized scoped long gun such as designated marksman rifle or a sniper rifle) to shoot at high-value targets at longer-t ...
observation. It can also be used for observing the effects of
artillery
Artillery is a class of heavy military ranged weapons that launch munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during sieg ...
fires and other general purposes.
The M49 is a fixed 20-power telescope with an
eyepiece
An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes. It is named because it is usually the lens that is closest to the eye when someone looks through the device. The ...
focus. It has a field of view of 2 degrees and an exit pupil diameter of 0.108 inches. The M49 is an erect image instrument that is magnified by the
lens
A lens is a transmissive optical device which focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (''elements'' ...
es in the eyepiece.
The M49 does not have an adjustable sunshade; however, the front end of the body tube extends approximately three-quarters of an inch beyond the objective providing a permanent sunshade.
The telescope is focused by turning the knurled focusing sleeve.
Additional Information
*Length: 14 ½ in
*Power: 20x
*Field of view: 2 degrees 12 minutes
References
{{Reflist
Military optical devices