Throw Distance - Runco Video Xtreme VX-40d Owner's Operating Manual

The high brightness of this projector is well suited for locations where ambient lighting
might be considered less than ideal for projection. A typical room with ceiling lights and
windows rarely requires special attention. Contrast ratio in your images will be noticeably
reduced only if light directly strikes the screen, such as when a shaft of light from a
window or floodlight falls on the image. Images may then appear washed out and less
vibrant.
In general, avoid or eliminate light sources directed at the screen.
Other considerations and tips that can help improve your installation:
• Keep the ambient temperature constant and below 35°C (95°F). Keep the projector
away from heating and/or air conditioning vents. Changes in temperature may
cause drifts in the projector circuitry, which may affect performance.
• Keep the projector away from devices that radiate electromagnetic energy such
as motors and transformers. Common sources of these include slide projectors,
speakers, power amplifiers, elevators, etc.

Throw distance

Throw distance is the distance measured from the projector's lens to the screen. This
is an important calculation in any projector installation, as it determines whether or
not you have enough room to install your projector with a desired screen size and if
your image will be of the right size for your screen.
You can quickly estimate the throw distance by taking the width of the screen and
multiplying it by the lens throw ratio. See Figure 2.1. The result of this calculation tells
you roughly how far back the projector should be positioned from the screen in order to
project a focused image large enough to fill the screen. For example, using a 0.75:1 lens,
throw distance would roughly be 0.75 x screen width.
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Runco VX-40d/-50d/-60d/-80d Owner's Operating Manual
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Figure 2.1 Estimating Throw Distance
7
Section 2: Installation and Setup
Ambient Light
Other Considerations
Projector Position
and Mounting