Assembling Lens Tubes: 5° And 10; Cleaning Polymer Lens: 5° And 10 - ETC Source Four Assembly Manual

Assembling lens tubes: 5° and 10°
Tools Required:
• #2 Phillips head screwdriver
1: Place the lens tube assembly (5) on your work surface. Align the assembly so that the colorframe
grooves are to your left.
2: If you are assembling a 5° tube, attach the handle (19) as shown in
(13), washers (12) and backing plate (2).
3: Install the required lens as shown in
(16), screws (9), nuts (11), and washers (10). The side of the lens with the fresnel grooves should
face the front of the tube. The smooth side should face the rear.
Cleaning polymer lens: 5° and 10°
WARNING:
Remove dust with a blast of oil-free air. If this is not sufficient, follow the instructions below.
1: Dip the lens in a clean isopropyl alcohol/water mixture (9 parts water to 1 part isopropyl alcohol).
2: Use a soft moistened nylon bristle brush to wash the lens' smooth side in a linear (non-circular)
motion.
3: Use the same brush to lightly wash the lens' ridged side by following its ridges.
4: Dip the lens in a clean isopropyl alcohol/water mixture (9 parts water to 1 part isopropyl alcohol).
5: Use air gun to dry the smooth surface. Use air gun to dry the ridged surface. Use air stream to
move the liquid away from you. Using this method, remove as much liquid as possible. Inspect
the lens for dirt. If necessary, repeat the entire process.
Lens Tube: 5°
Handle polymer lenses by their edges only. Never rub anything dry on a
polymer lens. Do not use glass and window cleaners on the lens. This will
damage the lens.
Figure 19 Figure 20
or
Figure 20
, using the screws
in the tube using required bumpers
21