What are keystone corrections and lens shift? Keystone Effect Most projectors will have at least vertical, if not horizontal, keystone correction; some even offer lens shift. Of course, we are all familiar with the trapezoidal “keystone effect”—the image appears wider at the top when the projector is too low, or wider on one side when […]
Light Sources For Power Projectors Lamps: These are just basic light bulbs. They are reasonably bright and tend to be inexpensive. The biggest issue with standard lamps is the relatively short lifespan. Although they tend to be rated for thousands of hours of use, LEDs and lasers just last longer. LEDs: LED projectors are either […]
Do You Need a Big Image in a Small Room? Short-Throw Projectors Finally, consider whether you need a short throw—meaning the ability to cast a given-size image at a short distance from the screen. Short-throw projectors let you throw a large image in tight spaces, and also minimize the risk of people getting […]
Do You Need Audio, or 3D Support? Powered External Speakers Not all projectors have audio capability, and for those that do, the audio is sometimes all but useless—particularly with highly portable projectors. If you need sound for your presentations or for watching video, make sure that the built-in audio, if any, is both […]
How Do You Plan to Connect? VGA Connector projectors offer a VGA (analog) connector for a computer and a composite video connector for video equipment, If your computer has a digital output, you may also want a digital connection on the projector, because it will eliminate any chance of problems, such as jittering […]
How Bright Should the Projector Be? There is no single best level for brightness, and brighter isn’t always better. For a home theater projector you plan to use in a dark room, for example, 1,000 to 1,200 lumens can easily give you a large, bright image, while 2,000 lumens may be so bright that it’s […]
