The Ricoh PJ WXL4540 projector reviewed here uses a single DLP micro-display panel and this projector features a short throw non-zoom lens and a laser light source rated at up to a 20,000 hour life. This model offers WXGA resolution of 1280 x 800 with a 16 x 10 aspect ratio and is spec'ed for a reasonably bright 3200 lumens of light output.
Ricoh also offers a lower priced model PJ XL4540 that is similar but offering lower XGA resolution (i.e., 1024 x 768) with a 4 x 3 aspect ratio and 3000 lumen light output.
The PJ WXL4540 produces a sharp image that is rather bright, even with the recommended 100 inch max. screen size. The long life laser light engine is what sets this projector apart from the sub-$1000 projectors that offer similar resolution and brightness. However, Ricoh has omitted a number of features that are frequently found on competing projectors and the potential buyer will need to decide if any of those omitted features are essential to their application.
The non-zoom short throw lens places very specific constraints on the placement of the projector relative to the screen or whiteboard. While this short throw arrangement may be the ideal choice for certain specific installations, it may prove unsuitable for other cases.
Another notable missing feature is the lack of network support, either wired LAN or wireless.