Type
Null
A
B
D
Lens
20°
12.8°
38°
6.4°
Accessory
Use the optional lens
There are 3 optional lenses. You can change the lens as follow.
1
2
Loosen the standard lens, and screw the optional lens as
follow.
Press UP and Down key on
the arrow at the same time to
change to type of lens. Refer
to the below table to see
what type of lens the letter
stands for, then press LEFT
or RIGHT key to set up the
measurement range
40
