HD290 Throw Distance:

Thank you for choosing Knoll projectors! The HD290 is DLP™ projector with 16:9 digital light processing chips to give bright clear images and display movies in a format similar to the one they were filmed in. It can display a wide range of formats from standard TV, extended definition TV through high definition TV. Its all glass lens allows for a wide level amount of zooming (1:1.3).

Some of the advances unique to the the HD290 are the new "flat pixel" technology and 10-bit video DACs for noise-free dark scenes and a very high contrast ratio (3000:1). The HD290 projector is designed only for use with 16:9 aspect ratio screens. 4:3 images can safely be displayed on the 16:9 screens. Some screens have moveable screen width curtains that can be controlled by the HD290 screen trigger output.

The Knoll CM26 ceiling mount kit is easy to install and swivels for exact placement. It drops the projector about 3" and the projector lens is about 6" from the ceiling. If more of a drop is needed, the CM20+6 extender adds an extra 6" drop. As many CM20+6 can be added as needed. For fine tuning the drop the CM25EX adjustable extender is available. It drops the projector a further 6.75” to 11” (17cm to 28cm).

The most frequently asked questions concerning DLP projectors are:

How much can the projector be tilted down (when ceiling mounted) or up (when floor mounted)?
About 20 degrees. The HD290 has a digital adjustable keystone but for best overall image the HD290 projector should ideally be level if the screen is vertical (which is usually the case).

Is the width of the 4:3 image the same as the 16:9 image?
No. The HD290 has 16:9 imager and displays 16:9 or widescreen images using its full width of 1280 pixels by 720 pixels high. When displaying 4:3 images it still uses all of its 720 pixels in height but the image width is reduced to about 960 pixels. Black bars are added on the sides of the image.

Projection throw distances are the maximum and minimum horizontal distances from the projector lens to the screen. If the projector is mounted level (this is strongly recommended) the image will drop (ceiling mounted projector) or rise (floor mounted projector).

If the projection distances below are not close enough or not far enough, Navitar makes excellent quality after market lens distance adaptors. Click here to go to the Navitar web site.

Most movies are filmed in 2.35:1 to 2.40:1 aspect ratios (also known as Cinemascope). The HD290 features built in scaling support to allow these images to be viewed at the highest possible resolution (30% or more higher resolution than a 720p plasma or direct view lcd) called anamorphic (requires anamorphic lens, available separately). We recommend the Panamorph brand of anamorphic lens. Click here to go to the Panamorph web site.

HD290 Projection Throw Distance 16:9 Video Screen:

MAXIMUM DISTANCE TO SCREEN (16:9) = 1.673 x SCREEN DIAGONAL SIZE
MINIMUM DISTANCE TO SCREEN (16:9) = 1.325 x SCREEN DIAGONAL SIZE
SCREEN OFFSET (IMAGE DROP OR RISE) (16:9) = 0.073 x SCREEN DIAGONAL SIZE

If the projection distances below are not close enough or not far enough, Navitar makes excellent quality after market lens distance adaptors. Click here to go to the Navitar web site.