
ETC Quick Guide
Source Four Lens Tube Configuration
Source Four Lens Configuration Page 2 of 2 Electronic Theatre Controls, Inc.
Lens Markings
All Source Four lenses now have color-coded dots for identification. Normal lenses have a
single dot of color. Enhanced Definition lenses have a combination of white dots and color
dots.
Lens color coding is illustrated below.
For maximum gel life with specific lens tubes refer to the tables below:
For lens tube assembly procedures, please refer to the Source Four Assembly Guide.
Standard Lenses
Enhanced
Definition Lenses
19°
26°
36°
50°
19° ED
26° ED
36° ED
50° ED
Rear lens - 1 white dot & 1 blue dot
Front lens - 1 white dot & 1 red dot
Rear lens - 1 white dot & 1 yellow dot
Front lens - 1 white dot & 2 red dots
Rear lens - 1 white dot & 2 blue dots
Front lens - 1 white dot & 1 orange dot
Rear lens - 1 white dot & 3 blue dots
Front lens - 1 white dot & 1 green dot
Lens - Red Dot
Lens - Black Dot
Lens - Yellow Dot
Rear lens - Blue dot
Front lens - Orange dot
Align lens dots toward this end
Lens
Tube
Soft Focus
Tube Back
Sharp
Focus
Soft Focus
Tube Forward
=Better gel life
=Worse gel life
=Better gel life
=Worse gel life
ED Lens
Tube
Soft Focus
Tube Back
Sharp
Focus
Soft Focus
Tube Forward
19º
26º
36º
50º
19º ED
26º ED
36º ED
50º ED
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