C1, TM 9-1240-318-35
1
Cap assembly
3
Light well
5
Dovetail
2
Eyeshield
4
Cap
6
Purging screws
Figure 1-1. Telescope, straight M120 and telescope, straight XM134.
with polyurethane foam padding on the inside, is
Effective focal length
2.250 in.
provided to transport and store the telescope when not
(EFL eyepiece)
in use.
Eye relief
3.50 in.
Diameter of exit pupil
.275 in.
(2) An instrument light M52E1 used on
Dioptral range (fixed)
-3/4 to -1.0 diopter
telescope M120 only (fig. 11, located in appendix B) is
used to provide illumination of the reticle in the
b. Carrying case.
telescope.
Length
21 in.
1-6. Data
Width
6 in.
Height
4-1/2 in.
a. Telescope.
Weight
6 lb approx
(1) Physical characteristics.
c. Instrument Light M52 E1
Length (w/cap and eyeshield)
19 in
Length (excluding lead)
7-1/4 in.
Width
2-3/4 in.
Diameter
1-7/8 in.
Height
2-3/4 in.
Diameter at rheostat
2-5/8 in.
Weight
3 lb, 4 oz approx
Weight (without batteries)
3/4 lb approx
(one battery weight)
2-1/2 oz approx
(2) Optical system.
d. Temperature Range.
Magnification
6 power
o
o
Field-of-view
5 deg 12 min.
Operable
-65 F to 160 F.
o
o
Effective focal length
6.375 in.
Storage
-80 F to 160 F.
(EFL objective)
1-3
