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BINOCULAR : M15 and M15A1

BINOCULAR : M15 and M15A1ModelM3, w/e      Line item No.       Federal stock No.
M15--------------------------4-01251-20----------------6650-670-2512
M15A------------------------4-01251-30----------------6650-530-0959

General
BINOCULAR:M15 and M15A1, consists of two prismatic telescopes pivoted about a common hinge so as to permit adjustment of the distance between the eyepieces(interpupillary distance). The hinge holds the axes of the two telescopes in parallel alinement. The prism system in each telescope erects the image and provides an offset line of sight which increases stereoscopic vision. The prism system also increases the effective optical length of the two telescopes without increasing their actual size. Each eyepiece can be focused independently of the other by turning the diopter scale in a plus or minus direction. The scale, which is calibrated in diopters, indicates the correction required for the corresponding eye. The binocular hinge is equipped with a scale which indicates in millimeters the interpupillary distance. These binoculars do not have a reticle. They are waterproofed and similar to BINOCULAR:M7.
They are used solely for observation purposes.

differences among models
These binoculars are identical with the exception of the filters. Binocular M15 has a soft rubber eyepiece and built-in polarized filter(to eliminate glare). In the binocular M15A1 this feature has been replaced with an eye guard to accommonodate the M1 filter.

data plate location
Model number, magnification, and diameter of the objectives are shown on the cover of the left eyepiece assembly.

Classification
M15----------------------Standard B(OTCM 36841)
M15A1------------------Standard A(OTCM 36841)

CHARACTERISTICS
Magnification.................................................. 7 power
Aperture........................................................... 50-mm
Field of view.................................................... 7 deg. 16 min
Exit pupil.......................................................... 0.280 in.
“F” number of objective................................ F/8.8
Filter.................................................................. M1


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