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Image quality
The BenQ V2400W uses a TN panel with a 5 ms response time, which is reduced to 2 ms for colour changes between grey tones.
The first impression we had of the image in the factory settings was pleasantly good. Overall, the colour reproduction was neutral and was convincing, even for grey scales. In the factory settings, there is no banding, meaning the division of an image into colour gradients, and there are also no pixel errors.
The white point, which looks neutral subjectively, also convinces us objectively with a colour temperature of 6471 Kelvin at a brightness level of 219 cd/m², which is too high. This brightness setting is absolutely sufficient for watching videos, but it should be reduced for working on the PC.
The maximum achievable brightness is 248 cd/m² and therefore just misses out on the manufacturer’s indication of 250 cd/m². The minimum brightness of the monitor is an incredible 16 cd/m².
If the brightness is set to zero and the contrast left at 50, it is still possible to achieve brightness of 92 cd/m², which should leave nothing to be desired. By reducing the "Contrast" setting to zero, it really is possible to achieve brightness of just 16 cd/m².
The contrast value of 50 percent selected by the manufacturer is the optimal value. Settings above this cause the brightest colour gradients to merge together. Thus, at a contrast value of 100 in grey wedges or colour wedges from 80 percent, everything is displayed with maximum intensity. In a grey wedge, a fifth of the almost white gradients are lost and replaced with white.
At a contrast setting of 60, the colour wedges are at their maximum from 95 percent, so 5 percent of the possible gradients are lost. The ideal contrast value is only achieved with a value of 50 percent.
A lower contrast value, which gives rise to a similar effect for darker colour gradients in many models, is not a problem for the BenQ V2400W. At a contrast of 0, the three darkest colour gradients merge with each other. However, no banding can be seen, so the contrast regulator for values under 50 obviously only causes a reduction in the backlight.
The precision with which the monitor achieves the sRGB target of 6500K in "Standard" mode with the "Normal" colour temperature without the need for some settings to be adjusted is very pleasing. |
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发表于 2008-8-24 21:03
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