EOTech MTM Mini-Thermal Monocular - Manual (Page 38)

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2.12 OBJECTIVE FOCUS
The objective lens must be focused for the viewing distance
being observed. Rotate the objective focus ring for best
image clarity. A change in viewing distance requires that the
objective lens be refocused. If already focused for a
distance of at least 15 meters (49 feet), no change in focus
is required between this distance and infinity. When the
WTM is not being used, install the objective lens cover over
the objective lens to protect it from possible damage.
2.13 STARTUP PROCEDURES
To achieve optimal performance and image clarity, the
following procedures should be accomplished in the order
presented, each time the WTM is to be used:
1. Turn on the WTM by pressing the PWR button. Wait 2 to
5 seconds for the system prompt and press the PWR
button again.
2. Install the objective lens cover and perform a calibration
as described in section 2.9.
3. Access the Main Menu by pressing the PWR button.
While looking through the eyepiece display, rotate the
diopter adjuster until the menu text appears sharp and
clear.
4. Remove the objective lens cover and adjust the gain
setting as described in section 2.11 to achieve a
comfortable contrast level.
5. While looking through the eyepiece at an object at least
one meter away, rotate the objective focus ring to obtain
the best (sharpest) thermal image.