ETC Source Four XT HID Zoom User Manual - Manual (Page 11)

9
Adjustments
Focusing the Beam
Two internal lenses control the size and focus of the light beam. Each lens is mounted in frames
and these frames slide along the rails. The lens frames are secured in the desired location with two
knurled thumb screws.
• The field lens is nearest the lamp and controls the width of the beam.
• The focus lens is furthermost from the lamp and controls the focus of the beam.
Figure-7 Lens Arrangement.
Step 1: Remove the barrel as described in Removing and Installing the Barrel, page 7 .
Step 2: Turn the Source Four XT on and aim it at a flat surface.
Step 3: Pull the shutters outward so that the aperture is fully open. Refer to Adjusting Shutters,
page 12 .
W A R N I N G : Do not remove the barrel and expose the interior of the fixture to water, such
as rain or snow. Do not stand in water while installing or servicing the
fixture. Failure to follow this warning can result in serious injury or death.
Focus lens
and frame
Field lens
and frame
Thumb screw