A short throw projector allows users to create big pictures in tight spaces, without concerns about shadows obstructing the image or light shining in the presenter's face.
Short throw projectors have very short throw ratios, the distance from projector to screen compared to the screen size. For example, a projector with a 1.5:1 throw ratio would have to be 7.5 feet back to project a 60-inch diagonal image. Short throw projectors like the Hitachi CP-A100, which boasts a 0.37:1 throw ratio, can project the same large image from just 1.4 feet away from the screen.
Short throw projectors prevent light from shining in the presenter's face. Image care of Mitsubishi.
Short throw projectors are commonly used in environments like these:
QuickTip: Projectors with quieter fans are desirable when using a projector in a smaller space.
Many manufacturers have short throw lenses as an option on selected projectors. However, some manufacturers include short throw lenses as a standard feature on specially designed projectors. Some projectors that ship with a short throw lens standard are:
See our complete list of short throw projectors»
While short throw lenses help create larger pictures from shorter distances; long throw lenses help create smaller, more viewable images from greater distances. A long throw lens is advantageous in large venues, particularly in fixed installations. Churches often require long throw lenses for worship spaces because the projector is usually mounted far away from the screen, behind the congregation. Without a long throw lens, the image would be too large.
Manual or digital zoom is a feature on many standard, long, or short throw lenses. The zoom feature allows for larger or smaller images from the same distance, much like a zoom lens on a 35mm camera.
If a short or zoom lens is not standard on the projector you choose, and you have the need for one, an external lens may be an option for you. The cost of external lenses varies. They generally range from $1,500 to $4,000 dollars depending on the type of lens you need, and the projector model. Not all projectors can use external lenses, and in some cases adding one may void the manufacturer's warranty. Ask a projector expert for details if you think an external lens is right for you.
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