BenQ HT4050 Home Theater Projector
Brightness. The HT4050 is rated at 2000 lumens. It has four factory preset operating modes and two user programmable modes. With the lamp on full power and the zoom lens set to its widest angle position, our test unit produced ANSI lumens readings as follows:
The HT4050 has a 1.6x zoom lens that will curtail light output by up to 23% as you move from its brightest, most wide angle position, to its most telephoto (longest throw for a given image size). This is less light loss than is typical for zoom lenses of this range. By comparison, the shorter 1.3x zooms on the HT2050 and HT3050 curtail light by up to 27%. As you see in the table above, you can also reduce the projector's brightness 30% by putting it into Eco mode.
Brightness Uniformity. Based on the nine quadrant ANSI lumen meter readings, our HT4050 measures 75% uniformity with the least bright area in the upper left and the brightest in the lower center. While this is lower than ideal, our test sample shows no obvious vignetting that is visible in a video/film image.
Color brightness is outstanding compared to many DLP projectors. In Bright and Vivid modes it measures 82% of white, in Game mode it measures 77% of white, and in Cinema it is the ideal 100% of white.
Rainbow artifacts. Infrequent, but they appear a bit more often than they do on the HT3050 and HT2050. When they do occur they are smaller and dimmer than typical rainbows on competing units. We believe most viewers will consider them to be rare and inconsequential.
Input lag. The Bodnar meter reports a lag of 96 ms with frame interpolation off, and 145 ms with it engaged.
Fan noise. Audible noise in full power mode is relatively low in both pitch and sound pressure. It is slightly more audible and somewhat higher in frequency than the HT3050 when the lamp is on full power, but it drops to slightly quieter than the HT3050 when put into eco mode.
High Altitude Mode is required at elevations above 1500 m, or about 5000 feet. In this mode the fan noise is increased, but it is still quite livable and relatively unobtrusive compared to most units in this price class. If you live at high altitudes, all of the BenQ home theater projectors tend to offer comparatively low fan noise in high altitude operation, although if you want to spend more money you can get quieter units for well under $2000.
Lamp life. BenQ estimates lamp life at full power to be 2000 hours in Normal lamp mode and 4000 in eco. Replacement lamps cost $249.
|Review Contents:||Picture Quality||Key Features||Performance||Set Up|
|Limitations and Conclusion|
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