Brightness & Contrast
To read about our monitor tests in-depth, check out Display Testing Explained: How We Test Monitors and TVs. We cover brightness and contrast testing on page two.
Uncalibrated – Maximum Backlight Level
We don’t have many monitors at the XF251Q’s price point in our database, so we selected value-oriented models that feature fast refresh and adaptive sync in a flat, 16:9-aspect panel. Our group today is Asus’ PG27V and XG32V, MSI’s MPG27CQ and MAG24C and AOC’s AG322QCX.
The XF251Q is rated for 250 nits of brightness, but our sample easily hit nearly 312 nits. It’s a bright screen with good uniformity and better contrast than many other TN-based displays, which helps in the color saturation department and increases image depth.
Black levels were more than twice as high as the VA panels in the group, but it was a good bit darker than the PG27V, which has a display that looked more gray than black.
The resulting contrast is 1,077.7:1, which competes favorably with many IPS monitors we’ve tested (outside of today's comparison group). Unless you go with a monitor that has a VA panel or HDR, you won’t find much better contrast and black levels than the XF251Q.
After Calibration to 200 nits
The XF251Q’s RGB sliders begin at center-range, so you can make balanced adjustments without reducing dynamic range. With the backlight set to 200 nits peak, the black level was an excellent 0.1877 nits, just the thing to make dark scenes in games look deep and foreboding. Again, you’ll need VA or HDR to beat it, even if you spend a lot more money. This is excellent performance at any price.
The XF251Q’s intra-image contrast stayed strong at a respectable 948.7:1. It was superior to the Asus PG27V in all aspects of our brightness and contrast tests. Obviously, Acer did not cut corners in its choice of panel parts. Its grid polarizer and layer fitment are as good as anything we’ve tested. Of course, the VA panels in our comparison group operated on a different level. That is the tech to consider when HDR isn’t in the budget. But for more modest PCs, this Acer offers excellent image quality.
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