Low Gamma Coverage

[tankflyboss]

Hello all,

I can’t fathom this one,  so I’ve come to the place I can be assured of help!

I have tried my Benq EW2440 monitor with both my Spyder 3 and Spyder 5,  I’ve reset the monitor and I can’t get better gamma  coverage the 56% as shown in the screenshot! I have an unbranded TN panel that’s about 13 years old (very basic monitor) and that manages 92% with near identical numbers on both Spyders.

My Benq by all accounts is a decent modern monitor,  so I’m very disappointed with what is coming back. I had initially connected the monitor via HDMI and guessed it may have been using a shorter range of RGB values, but I’ve had a near identical set come back on  good old fashioned VGA too.

This panel is a VA panel,  which I don’t know a tremendous amount about, have a cocked up a setting in the program?  I’ve just run a standard calibration,  I adjusted the RGB values on the monitor to centre them up before I ran the calibration on both monitors.

I am going to be using this monitor more for creative applications so only having 56% of sRGB is quite worrying,  monitor specification is 95% coverage.

Any tips or suggestions?

Cheers,
tfb.

• This topic was modified 8 years, 3 months ago by tankflyboss.

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[Ori Sagiv]

Maybe VGA uses limited RGB too..
Try connecting in HDMI again and just change the colorspace to full RGB – 0-255 in the Nvidia control panel at the “change resolution” tab.

Also see if there is an option in the monitor controls itself  to choose between limited and full RGB.

• This reply was modified 8 years, 3 months ago by Ori Sagiv.

[Florian Höch]

It’s gamut, not gamma (very different things!) 🙂

I’ve just run a standard calibration, I adjusted the RGB values on the monitor to centre them up before I ran the calibration on both monitors.

If you’ve restricted the channels too much, that’ll limit the gamut, as well as forcing a maximum brightness through the video card gamma tables (brightness should only be adjusted via the backlight).

Reset the monitor and any graphics card color settings to factory defaults, and re-profile with white point and white level set to “as measured”. Does gamut coverage increase?

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