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Measurements Results

The viewing angles of this monitor are wide – the S-PVA matrix shows its best right away. Subjectively, the color reproduction, backlight uniformity, response time and other parameters of the 2408WFP are good. Color gradients are reproduced perfectly, without banding, at any value of contrast. So, this monitor is free from obvious defects.

I should confess some users have reported that their 2408WFP had a pinkish hue of the screen. I didn’t spot this problem with my sample.

By default, the monitor’s Brightness and Contrast are both set at 50%. I achieved a 100nit level of white by choosing 28% brightness and 35% contrast. The monitor regulates its brightness by means of pulse-width modulation of the backlight lamps at a frequency of 161Hz.

The backlight brightness is far from uniform. The average deflection is 6.1% on white with a maximum of 29.1%. On black, the average and maximum deflection are 4.1% and 22.2%, respectively. The pictures above indicate that the screen is darker on the right. Otherwise, there are no bright or dark spots on the screen. It means that this nonuniformity is not going to be very conspicuous.

The 2408WFP employs lamps with improved phosphors and delivers a color gamut which is larger than sRGB in greens and reds. Note, however, that the color gamut triangle of the 2408WFP is larger than sRGB overall but does not cover the latter. Thus, this monitor is not as good as its sRGB counterparts at reproducing yellow and green-yellow hues.

But again, its red color is just splendid. Extended-gamut monitors with CCFL backlight we have tested so far could only boast a pure green whereas deep red was the prerogative of monitors with LED-based backlight such as Samsung SyncMaster XL24. The Dell 2408WFP breaks this rule. It uses fluorescent lamps as its backlight but its red is far purer than on typical sRGB models.

You may wonder what to do if you want to have ideal color accuracy for sRGB images. After all, most photographs are sRGB-oriented. As you remember, there is a mode called sRGB in the monitor’s menu.

My measurements show that the monitor does try to bring its color gamut down to sRGB, but it doesn’t succeed much. It cannot cover yellows because of the discrepancy between the gamuts and its red is somewhat worse than in sRGB.

So there is only one way left for you to ensure high color accuracy for sRGB photographs. You must use software that can work with monitor’s color profiles and adjust the image according to them. Well, if you buy the monitor for games, movies and text-based applications, its pure and saturated colors won’t be a problem and you can do without a color profile.

The gamma curves look good at the default settings: red and green are almost ideal but the blue curve is sagging a little.

The curves get close to each other at the reduced brightness and contrast but also rise up a little above the ideal curve for gamma 2.2 in the left part of the diagram. In practical terms, it means that darks are displayed brighter than they should be.

The curves have almost the same shapes in the sRGB mode. Their value of gamma is somewhat lower than the required 2.2, making the image brighter than necessary. The deflection from the ideal curve is small, however, so the only real problem with this mode is that the monitor’s effective color gamut doesn’t coincide with sRGB when you enable it.

 
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