Runco D-73d Ultra Installation & Operation Manual page 76

Installation
• Vertical Position (Y-adjust): Loosen the Height/Pitch Adjustment Knobs (Whitney
anamorphic lens; see Figure 3-26) or Button-head Height Adjustment Screws
(Shasta anamorphic lens; see Figure 3-27) on either side of the lens. Then, slowly
move the anamorphic lens into place so that there are no shadows on the top or
bottom of the screen:
Too Low
Too High
When the vertical position is properly set, tighten the Height/Pitch Adjustment Knobs
or Button-head Height Adjustment Screws to secure the lens in place.
• Adjusting the Pitch (Angle): Next, angle the lens to eliminate any top-to-bottom
pincushion distortion. To do this, loosen the Height/Pitch Adjustment Knobs
(Whitney anamorphic lens; see Figure 3-26) or Button-head Pitch Adjustment
Screws (Shasta anamorphic lens; see Figure 3-27) on either side of the lens to allow
it to pivot freely. Then, adjust the anamorphic lens angle so that the projected image
is rectangular:
Incorrect Lens Angle
The anamorphic lens will almost always be angled with respect to the projector; this
is normal.
Once the proper lens angle has been set, firmly tighten the Height/Pitch Adjustment
Knobs or Button-head Pitch Adjustment Screws to secure the lens in place. For a
Shasta anamorphic lens, also tighten the Set Screws on either side of the lens to
lock the angle.
There may be some pincushion distortion even after the lens is
Note
properly adjusted, especially at shorter throw distances. If this is
the case, Runco recommends that you slightly over-scan the
image into the screen frame area to mask the distortion.
60 D-73d Series Installation/Operation Manual
Correct position
Correct Lens Angle