ETC Source Four - Assembling Lens Tube - 19° to 50

Lens Tubes - 19° to 50° 15
Assembling lens tube - 19° to 50°
Lens Positions
The lens tube casting can accept either original or Enhanced Definition (ED) lenses. The
lens positions are color-coded within the lens casting to match the colored dots on the
lenses (see Figure 15). Only lenses bearing at least one dot of the indicated color should
be placed in that position.
Figure 15
Blue 
BLU
36
36ED
19ED
50ED
Yellow 
YLW
50
26ED
Green 
GRN
50ED
Orange 
ORNG
36
36ED
Black 
BLK
26
Red 
RED
19
19ED
26ED
Align lens dots toward this end