The Optoma TX542-3D is a well-balanced projector that features a very sharp picture and great performance and warranty for the price. Well-suited for the classroom or conference room, the TX542-3D is a XGA DLP projector with up to a 5,000-hour lamp life, a filter free design and Optoma's 3-year express replacement service. An above average performer on 2D video and static presentation material, the TX542-3D is also 3D capable and supports refresh rates up to 120Hz.
Brightness: While our review sample did not perform to Optoma's specifications, it produces enough light output to be capable of performing in a variety of use settings. The TX542-3D measured a peak brightness of 1,968 ANSI-lumens or just over 70% of the 2,800 ANSI-lumen specification. Peak light output was found using Bright lamp mode and the Bright picture preset and increasing the Contrast setting to 60. Brightness uniformity was a high 82% making any differences in brightness across the screen imperceptible.
1,968 ANSI-lumens can support a 4:3 aspect ratio unity gain screen of 135 inches in diagonal with a 30 foot-lambert brightness level, bright enough for use with non-direct ambient light in the room. A 100-inch diagonal screen would result in a brightness level of almost 60 foot-lamberts, which allows the TX542-3D to be used in environments with significant amounts of ambient light.
Across different picture modes, the measured reduction between Bright and Eco was only 7-9%. Power consumption between Bright and Eco was in-line with the measured difference in light output. Measured using a Kill-A-Watt meter, the TX542-3D consumed 225 watts in normal mode and 207 watts in Eco mode or 8% less power in Eco mode.