4.3.2 Disassembly and assembly of focus lens
Tools: 2mm hexagon key wrench, dust-free cotton swab, ethyl
alcohol and masking tape
※ The disassembly and assembly shall be completed in a
clean place. When the lens are dismounted, the dust-free gloves
or dust-free fingerstall.
※ Disassembly and assembly steps:
Step 1: Loosen the M2.5 hex socket head cap screw in the
figure by hand with a 2mm hex wrench.
Step 2: Take out the focus drawer module by direct
drawing/pulling in the horizontal direction.
Step 3: Seal the port with textured paper to prevent the dust
from entering the cavity, resulting in pollution.
Step 4: Rotate the gland for 90° after pressing it downward
gently and take out the gland by two bosses aligning to left/right
opening to replace the focus lens.
(Note: orientation of installed lens in the concave and
convex direction)
Cap pressing
The surface which is more
convex shall be upward
D20*F150 focus lens
The face which is flatter
shall be downward
Focus lens D20*F150
20.5*16*2.3
Elastic sealing ring
M2.5 internal hexagon screw
Focus drawer module
13
    "