Runco LS-3 Series Installation & Operation Manual page 52

Installation
4. 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.
5. When the height and angle are properly set, tighten the Height/Pitch Adjustment
Screws to secure the lens in place.
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.
36 Runco LS-3/LS-5 Installation/Operation Manual
Correct Lens Angle