![]() ![]() The small focusing wheel on the side required a bit of finessing to make sure our image was sharp, though.Īfter 15 minutes, the top right corner of the C120 was 114 degrees Fahrenheit, and the bottom was 100 F. We noticed some lag when moving the mouse while playing an HD movie, but it was barely noticeable. While not as rich as the W200, the red Starfleet uniforms and the blackness of space in "Star Trek" showed up well when we played the movie through the C120. Picture quality was quite good for something this size. When we switched to USB power, the C120 averaged just 45 lux. ![]() While smaller than the W200, which projected a 78-inch image from the same distance, it was marginally brighter, by about 4 lux. When 6 feet from a wall, the C120 projected an image that was 49 inches diagonally, with an average brightness of 94 lux when using the external power supply. Like the ViewSonic W200 and ASUS P1, the Acer C120 uses a DLP LED, only it's rated at 100 lumens, compared with 200 lumens for the other two. The only controls are within the taskbar on your computer, which lets you mirror or extend your display. That means there's no anti-keystoning, or settings for brightness, contrast, and so forth. Unlike most other projectors, there's no on-screen menu for the C120. If you don't use the external power supply-which is the same type used by Acer's netbooks-the brightness is cut in half. While this means the projector will take up two of your USB ports, it also means that it doesn't require an external power source to work. As soon as you plug it into your notebook, the C120 automatically installs the required software. The projector comes with a USB y-cable, as it requires two USB ports next to each other, which could be an issue on some ultraportables. Unlike other portable projectors, the C120 uses USB 3.0, not a VGA port, to connect to a notebook. ![]()
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