Panasonic PT-RCQ80 Operating Instructions Manual page 42

Distance from the projector
to the screen
L2
L3
L4
A2
Attention
f The dimension of L4 is not the distance between the back surface of the projector and the wall, but the distance between the back surface of
the projector and the screen surface. Install the projector with 500 mm (19-11/16") or larger space between the back surface of the projector
and the wall or any object so that the ventilation is not obstructed.
When installing the projector in a confined space, provide air conditioning or ventilation separately. Exhaust heat may accumulate when the
ventilation is not enough, triggering the protection circuit of the projector.
Note
f For the adjustment range of the projected image position with the lens shift, refer to "Lens shift range" (x page 80).
[GEOMETRY] projection range
[VERTICAL KEYSTONE] (viewed from the side)
Screen
Vertical arc correction (viewed from the side)
Screen
Arc center
Screen
42 - ENGLISH
Chapter 2 Getting Started — Setting up
Formula
= L1 + 0.023
= L1 - 0.166
= L1 - 0.704
= A1 + 0.200
Projection distance
Arc radius
Projection distance
Arc radius
[HORIZONTAL KEYSTONE] (viewed from above)
Screen
Horizontal arc correction (viewed from above)
Screen
Arc center
Screen
(Unit: m)
Projection distance
Arc radius
Projection distance
Arc radius