This week we got our hands on the brand new Toshiba ex20 short-throw projector to test it in a rear projection setup. Some facts about the projector: XGA, 130% lens offset, ~0.68 throw-ratio (distance-to-image-width), 2300 Ansi lumen, DLP.
The test results were quite good. Because of the high lens offset it’s easy to use in combination with a mirror. The mirror and projector can be simply mounted in a angle of 90°. Furthermore, the projected image was really good. Especially, the usual DLP-”rainbow/flickering” was not strongly visible. At least not for our human eyes.
A drawback we figured out is the chroma error of the lens. At the top of the image the blue/yellow distortion is about the size of one pixel as it is visible in this picture. After some more tests we figured out that the yellow color is really nice after all. The test images yellow just wasn’t saturated enough.
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