High-End Features on Moderately-Priced Projectors

When a screen and projected image are not perpendicular to each other, keystone correction is needed

As a subscriber of this newsletter, you probably already know that video projectors have become more affordable over the past few years. But the recent trend in adding higher-end feature sets, such as optical zoom, automatic keystone correction, and image presets have also made mid-range projectors an improved value. So what are these features and how do they benefit you?

Optical Zoom

If you have ever set up your projector to present and realized that it is not possible to position your projector back far enough for the image size you want, optical zoom is a feature you will appreciate.

Optical zoom allows you to make a larger image from a given distance, without physically moving the projector or sacrificing image quality. As easy to use as a zoom lens on a camera, the optical zoom is usually just the turn of a lens, or a press of a button.

Projectors that have optical zoom have varying degrees of zoom capability. Some can nearly double the size of your image. Optical zoom is listed in the projector specs as a number such as 2.0x, or two times for double the image size from the same distance. This feature may also allow you to use shorter cables, meaning less signal degradation and a lower cable cost.

Keystone correction features

Automatic Digital Keystone Correction

Keystone correction has come in varying forms over the years. Some projectors offer keystone correction by including adjustable legs at the front of the projector, while others are able to square the image digitally through an internal computer.

Automatic correction is an added convenience, as the projector can automatically detect if keystoning is occurring, square the image automatically, saving you time and effort.

Projectors measure keystone correction capability in degrees. Projectors with +/- 40 degrees can correct for greater angles than those with +/- 15.

Image Presets

Sometimes you want the technology you use to just know what you want, without having to do anything. That