Projector Reviews

BenQ HT5550 Projector Review- Advanced Calibration

BenQ HT5550 Projector Review – Advanced Calibration: CMS Calibration, Calibration Charts


RGBCMY Hue Saturation Brightness
Red 206 197 198
Green 265 211 175
Blue 174 200 162
Cyan 240 200 200
Magenta 297 91 203
Yellow 165 165 183

The default color gamut was hand adjusted at the factory. The values for all six colors were not at their centered (default) positions as most projectors are. The pre-calibration color gamut measurements were actually quite good but had the familiar errors I see on nearly all DLP projectors. The most common of these is saturation linearity errors, seen here mostly with red. Also, some of the colors don’t make it out to 100% REC.709 and there are the hue errors especially among the secondary colors. Thankfully the CMS does work well and so I was able to make improvements in all those areas I mentioned. Post-calibration color gamut was excellent, one of the best I’ve seen with DLP.

CMS Settings for Best Mode 4K/HDR – Cinema Mode

RGBCMY Hue Saturation Brightness
Red 206 200 200
Green 177 200 200
Blue 200 200 200
Cyan 170 200 200
Magenta 187 188 200
Yellow 188 209 200

BenQ advertises the HT5550 as hitting 100% of the P3-DCI color gamut (with the WCG filter on). My pre-CMS calibration measurements did not bear this out. Except for magenta all the colors fell short of their 100% saturation targets. Red, green and yellow were the worst offenders ranging from 70 to 90% coverage and the oh so common linearity issues were also on display.

During my CMS calibrations, I was able to move the 100% saturation points out a tiny bit. If I moved them too much however, it would increase the linearity errors of the lower saturation points. Overall, I felt post-calibration image/color did look better than it actually measured through the HDR effect was low (even for a projector).


With the wide color gamut filter off for this Brightest Mode 4K/HDR calibration we know going in we would be dealing with a color gamut closer to REC.709 but gaining nearly 50% increase of lumen output due to keeping the wide color gamut filter off. Normally in this situation I would measure the color gamut with a REC.709 target inside the REC.2020 container. When I tried that I got results that were so messed up they were really useless. So, I used the P3 target same as I did for my first 4K/HDR calibration that used the wide color gamut filter. Although we know we’re not going so see the colors reach out to 100% saturation at least the charts make much more sense. Now here’s the weird part. Without the WCG filter in place the color gamut is actually not that different than with the filter. Blue, magenta and red are basically the same while cyan, green and yellow are a little lower with green measuring the lowest at 60% P3 saturation. I attempted to calibrate CMS but after seeing limited results I decided it was best to leave the CMS alone since the projector has to perform some kind of color remapping.

RGBCMY Hue Saturation Brightness
Red 200 200 200
Green 200 200 200
Blue 200 200 200
Cyan 200 200 200
Magenta 200 200 200
Yellow 200 200 200