Adjustments; Centering Lamp And Adjusting The Field; Selecting The Field Angle And Focusing The Beam - ETC Source Four Zoom User Manual

Adj ustments
C e n t e r i n g l a m p a n d a d j u s t i n g t h e f i e l d
Rear lamp
housing
Outer Knob - lamp
center adjustment
The two concentric knobs located on the lamp housing allow you to align the lamp and adjust its
field. See Figure
lamp's field.
Step 1: Turn on the Source Four and aim it at a flat surface. Adjust the barrel to create a hard
edge.
Step 2: Unlock and loosen the outer knob by turning it counterclockwise.
Step 3: Gently move the outer knob from side to side and up and down until the lamp is centered
within the reflector.
Step 4: Once the lamp is centered, turn the outer knob clockwise to lock it in place.
Step 5: Finally, turn the inner knob either clockwise or counterclockwise to achieve an optimum
flat field. See
S e l e c t i n g t h e f i e l d a n g l e a n d f o c u s i n g t h e b e a m
Step 1: Press the locking lever push button and lift the locking lever to unlock the focus dial as
shown in
Step 2: To reduce the field angle, rotate the focus dial clockwise. To enlarge the field, rotate the
dial counterclockwise.

Adjustments

Inner Knob -
peak/flat field
adjustment
Figure 4
4. The outer knob centers the lamp within the reflector. The inner knob adjusts the
Figure 5.
Beam focus dial
Figure 6.
Locking lever
push button
Locking lever
Light baffle
Flat field-best adjustment
Hot spot - lamp pulled out
too far
Field with hole - lamp
pushed in too far
Figure 5
Figure 6
5