New HP LP2475 calibration not good ??

thatsright

Diamond Member
May 1, 2001
3,004
3
81
Just got the gorgeous HP LP2475w monitor. Trying to calibrate it and not trusting the results. Using a Spyder 3 Pro w/ the following settings:

Brightness down to 65
Contrast to 90.
sRGB
Gama 2.2
Kelvin 6500k

For calibration I selected Grey balance. Spyder 3 strongly discouraged me from using RGB sliders so I picked Kelvin 6500lk. (But I did try RGB sliders and I could not get R channel to get within target values with it set at 255?) The process was quick but something is still off I think. I sent the Datacolor calibration photos you see at the end of the calibration to Adorama to be printed out. These photos were ?straight to print? original. But these photos look darker while onscreen its looks vivid and rich. I also had a Smugmug.com calibration print done at Adorama and got the same results, noticeably darker/duller.

Can you suggest anything? Is it best to use RGB sliders to set color temperature?? Is the brightness still too high?
 

thatsright

Diamond Member
May 1, 2001
3,004
3
81
After reading a few reviews of this monitor online, I tried a few different calibration settings. I read a few online review sites that calibrated and so I tried the below settings and using right now:

Brightness 20
Contrast 65
Red 240
Green 212
Blue 212
Luminance 118.9
Difference 0.04 DAB

With the above, the screen is noticeably darker. The brightness is the lowest I can go to identify the 'Four black boxes' with the Spyder 3 as four separate shades of grey/black in the calibration setup. With these settings, the calibration prints Adorama printed out are closer to what I'm seeing on screen. But they still look to bright on-screen. Before the above, I tried:

Brightness 50
Contrast 88
RGB Values pretty much as above
Luminence 219.8
Diff 0.08 DAB

The screen was pleasing, not too dark as it is now. But my first calibration I had:

Brrightness 65
Contrast 90

Looked great, but had a feeling it was too bright.

I must say for all these profiles I tried, the color has never been an issue. Very accurate. Just the Brightness/Contrast I'm worried about. The current #'s with brightness of 20/contrast 65 seems too low? But if its actually accurate then I can get use to it.

Suggestions?
 

PurdueRy

Lifer
Nov 12, 2004
13,837
4
0
If you're wanting to match the print standard you're talking about lowering the brightness to 80cd/m2 which of course is going to be very dark. Reason being that paper doesn't produce its own light source so they will never be identical.

Really brightness is a personal preference type of thing. It shouldn't affect the color accuracy much unless its lowered beyond where your colorimeter is sensitive.I would use the third calibration you did. Although I still might lower contrast a bit more. I think you may find that the RGB sliders work better when the contrast is lower.
 

evolucion8

Platinum Member
Jun 17, 2005
2,867
3
81
Originally posted by: thatsright
Just got the gorgeous HP LP2475w monitor. Trying to calibrate it and not trusting the results. Using a Spyder 3 Pro w/ the following settings:

Brightness down to 65
Contrast to 90.
sRGB
Gama 2.2
Kelvin 6500k

For calibration I selected Grey balance. Spyder 3 strongly discouraged me from using RGB sliders so I picked Kelvin 6500lk. (But I did try RGB sliders and I could not get R channel to get within target values with it set at 255?) The process was quick but something is still off I think. I sent the Datacolor calibration photos you see at the end of the calibration to Adorama to be printed out. These photos were ?straight to print? original. But these photos look darker while onscreen its looks vivid and rich. I also had a Smugmug.com calibration print done at Adorama and got the same results, noticeably darker/duller.

Can you suggest anything? Is it best to use RGB sliders to set color temperature?? Is the brightness still too high?


Which type of panel does your monitor use? I used the HP Display Assistant for my LCD and worked great, my LCD uses P-MVA panels.
 

evolucion8

Platinum Member
Jun 17, 2005
2,867
3
81
Awesome, did you tried also to select a Default ICC Color Profile in the display options? It may solve some banding issues in certain dark scenarios like in games or movies.
 

Monkeymilk

Junior Member
Feb 2, 2011
1
0
61
I had loads of problems with over saturation of colour on my HP LP2475w which could not be resolved by the monitor controls or any standard ICC profiles. I finally resolved the problem for good by borrowing a hardware monitor calibrator and generating an ICC profile for the LP2475. This profile should work and both Mac and PC and can be downloaded from my blog.