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Iiyama AS4821DT

This model is ranked higher in the Iiyama’s product line due to its wider (19”) matrix and richer functionality. However, it uses a TFT panel similar to the one in AS4611UT: it is MVA from Fujitsu. The price of the display nearly hits the $1300 mark.

The display has prettier looks than the previous model and boasts more attractive features: the base allows adjusting the screen tiling, rotating it in both directions by 45 degrees, setting the screen higher or lower and rotating it into the portrait mode.

The assortment of inputs is astonishing, too. The display has two DVI inputs (if you want to connect it to the D-Sub output of the graphics card, there is a D-Sub-to-DVI cable included) and one 4-port USB hub (this option may suit people who have a USB mouse or keyboard – it’s more handy to have them connected to the display rather than to the system case).

The menu is made quite well, but its three-page structure is rather inconvenient. Moreover, the buttons are stiff and you have your fingers aching in no time. The brightness and contrast settings are accessed by means of quick buttons, like in the previous display.

Besides the standard settings, the menu contains an option for display calibration (the gamma value). You are offered three variants: GAMMA1, GAMMA2 and GAMMA3. As our measurements proved, the first option corresponds to 2.2 gamma, the second – to 1.8 gamma and the third – to 3.0 gamma (I can’t make out what’s the idea behind this high number, but maybe it is used somewhere, who knows). I carried out the tests using 2.2 gamma, which is the standard value for the PC/Windows platform.

The color temperature setting also offers three variants: Color1, sRGB and user-defined. Our measurements in the Color1 mode gave out 5520K on white and 7150K on gray. For the sRGB mode, these numbers are 7020K and 7380K, respectively. The sRGB mode, which should have a color temperature of 6500K, is set up quite well, while the temperature dispersion across 1.5 thousand degrees in the Color1 mode leaves an unpleasant feeling.

By default, both: brightness and contrast settings are set to 50%, and a screen brightness (i.e. luminance of white) of 100nit is achieved at 30% brightness and 32% contrast. Just like we saw it by the previous model, this one is unable to work with a brightness setting above 60% - the screen loses the black color completely (although not as dramatically as by AS4611UT).

Unfortunately, Spyder was unable to calibrate the display with any nice precision. The calibrator work is based first of all on the white balance, while the default settings have a slump in the upper part of the dynamic range.

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