Runco RS-900 Owner's Operating Manual page 57

To avoid clipping the corners of the image, position the anamorphic
lens as close as possible to the primary lens.
Adjusting the Lens Height (Y):
1. Project a white field on the screen.
2. Ensure that the four Height (Y) Adjustment Screws are loose enough to allow vertical
movement of the lens assembly.
3. 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
4. When the height is properly set, tighten the Height Adjustment Screws to secure the
lens in place.
Runco RS-900 Owner's Operating Manual
Ceiling Mount
Bracket
43
Correct position
Installation