Product Overview: Telescope, Panoramic: M115
NSN: 1240-00-895-9186
P/N: 8587340

General Description
Telescope, Panoramic: M115 is used with Mount, Telescope: M137 for indirect fire, in self-propelled weapon fire control systems of Gun, Field Artillery, Self-Propelled: 175mm, M107 and Howitzer, Heavy, Self-Propelled: 8 inch, M110. It is a 4-power, fixed focus telescope, with a 10 degree field of view. It maintains an upright image regardless of whether the line of sight is directed forward, to the side, or to the rear of the observer. A 90-degree prism is rotated with the head of the telescope through a complete azimuth circle of 6,400 mils. The prism may also be elevated and depressed through angles of 300 mils from the horizontal. The telescope has an azimuth mil counter mechanism in place of azimuth scales. The counter registers azimuth travel in quarter-mil units. The horizontal eyepiece segment of the elbow assembly is extended so that a helmeted soldier is able to sight without interference from the counter assembly. The azimuth worm, used to rotate the head, contains only one knob, pinned to the right end of the worm shaft. The worm has no throwout provision for disengaging it from the worm wheel. Instead, the azimuth knob has a folding crank which may be swung out in an arc of 180º for rapid turning of the rotating head. In the closed position, the crank does not interfere with normal use of the knob. The reticle is illuminated by light entering a red glass window or by a reticle lamp. The horizontal centerline of the reticle is graduated into 5 mil increments. The surfaces of all optical elements except the reticle are coated to minimize reflections and to increase light transmission.