Dell 2400MP User Guide - Page 46

Zoom Lens, Zoom Lens Ratio, projector from a fixed distance. For example

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Page 46 highlights

Zoom Lens- Lens with a variable focal length that allows operator to move the view in or out making the image smaller or larger. Zoom Lens Ratio- Is the ratio between the smallest and largest image a lens can projector from a fixed distance. For example, a 1.4:1 zoom lens ratio means that a 10 foot image without zoom would be a 14 foot image with full zoom. 46 Glossary

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46
Glossary
Zoom Lens—
Lens with a variable focal length that allows operator to move the
view in or out making the image smaller or larger.
Zoom Lens Ratio—
Is the ratio between the smallest and largest image a lens can
projector from a fixed distance. For example, a 1.4:1 zoom lens ratio means that a
10 foot image without zoom would be a 14 foot image with full zoom.