Please Note: As more information becomes available on measureing brightness for ultra short throw projectors such as the Ricoh PJ WX4310N, we will update this page.
Measuring brightness levels is rather difficult with ultra short throw projectors because the lens is so close to the screen. Also, the light shines upward. This upward shining of the light creates a large differentiation between the light that hits the bottom of the screen and the light at the top. Typical projectors that project from the front also have difference in distance from the center of the lens to the outer edges, but the differences are much smaller and often not considered when running our lumen tests. We do however try to make note of uniformity when it seems the image is noticeably brighter or darker around the edges as opposed to the center of the screen. With all that said, it means measuring the brightness of the PJ WX4310N was tricky and might be inaccurate, but based on the way in which it was measured and a little creativity, our best guess is given based on the lumen meter readings.