Runco VX-4C, VX-6C manual Calculating Throw Distance

INSTALLATION AND SETUP

Always consult this section when planning a projector installation. See also section 2.7 and 2.8, Projector Position and Mounting.

Calculating Throw Distance

Correct throw distance depends on the screen size and lens present-the larger the image needed, the greater the distance you must allow between the lens and screen. Once you know the screen size and lens type present, you can calculate the precise throw distance you require by using the appropriate formula as found in this appendix.

Throw distance is the distance between the projector front feet and the screen. This measurement is not necessarily parallel to the floor-i.e., the projector and screen may be inclined.

NOTE: If your projector is tilted up or down in relation to the screen, as is sometimes the case for large venues or elevated installations, throw distance still represents the smallest measure- ment between the screen and front feet centers.

Pre-calculated throw distances for the complete range of lens types and screen sizes appear in the charts and graphs on the following pages. Refer to these examples to quickly determine the prop- er throw distance (±5%) for your installation and lens.

NOTE: Variable operating ranges for zoom lenses appear in graphs only.

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