Optoma W304M Review
3100 lumens and just 3.3 lbs
Suitably bright image with wide brightness range. The W304M's light output in its brightest mode was acceptably close to its 3100-lumen rating in our tests, at 2621 lumens, or about 85% of the rating. Other factory-defined operating modes ranged from 1039 lumens for sRGB to 1995 lumens for Blackboard. Brightness drops by about 23% in Eco mode, to 2027 lumens with the brightest preset. As a practical matter, the W304M was easily bright enough with most of its preset modes to light up a 92" diagonal screen in moderate levels of ambient light.
One issue for DLP projectors is that color brightness can be significantly lower than white brightness, with the difference potentially affecting both color quality and the brightness of color images. The greater the percentage difference, the more likely there will be an effect on color quality, and more extreme that effect is likely to be.
With the W304M, we measured the color brightness at roughly 25% of the white brightness in the brightest mode, which is why some colors are noticeably darker in that mode. With other modes, the color brightness ranged from 35% of white brightness in Blackboard mode to a solid 66% in sRGB mode, in which there is little noticeable effect on color quality.
Acceptable brightness uniformity. The W304M does an acceptable job of maintaining uniform brightness across the screen. Its measured brightness uniformity is a low 55%, which is enough variation to see easily on a solid white screen. With the review unit, the bottom of the screen was clearly brighter than the top, and I saw a slightly cool spot in one corner. However, the brightest and dimmest areas are far enough apart that the lack of uniformity is hard to see when the screen is broken up by graphics or text. Unless you're unusually sensitive to variations in brightness this shouldn't be an issue.
Acceptable connectivity. As with most portable projectors, the W304M offers limited connection choices, but it includes everything you're likely to need, if not everything you might want.
- 1 HDMI 1.4a
- 1 VGA IN (for RGB or component)
- 1 RCA composite
- 1 Stereo mini plug IN
- 1 Stereo mini plug OUT
- 1 USB B (for mouse control)
|Review Contents:||Introduction||Strong Points||Testing and Connectivity||Limitations and Conclusion|
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