This Starlight night vision scope features XX1211 and XX1340 image intensifier tubes, flash protection, reticle adjustments, focusing knob, on/off button, shade control knob, reticle brightness control and come in the original hard shell case The M49 Spotting Scope, also known as the M49 Observation Telescope, is a multipurpose scope system used primarily for long range marksmanship observation. It can also be used for observing the effects of artillery fires and other general purposes. The M49 is a fixed 20-power telescope with an eyepiece 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 lenses in the eyepiece.