Thought I would post some calibration graphs so you can see how accurate I got the picture. I calibrated with BL dimming off and then turned that on when I had done the calibration. The dimming makes gamma slightly more variable obviously but then plasma was never absolute either, other than that the greyscale & colours stayed the same.
Greyscale result -
Gamma (BL dimming off)
Colours -
As you can see an excellent result. Magenta 100% is the only minor issue. I could make 75% & 50% a bit less accurate to drag 100% closer to the box but I figured how often is 100% used in average picture levels so left it as is.
This calibration was done at close to 120cdm2 for 100% white, although when you turn on BL dimming MAX that drops to 111cdm2 on a windowed test pattern. The BL dimming will vary stuff a little.
I checked my figures & with this calibration without dimming it was as follows -
Black - 0.097 cdm2
White - 118.48 cdm2
Avg gamma - 2.4
On/Off contrast - 1219:1
With dimming on MAX -
Black - 0.006 cdm2
White - 111 cdm2 (variable on content, can go brighter)
Gamma - stuck close to 2.4 & then at 70% grey & later got a bit darker on calibration graph using windowed test patterns (will be variable in actual content but on actual movies etc looked great with no issue on shadow detail)
On/Off contrast - 17598:1
On the 4x4 ANSI chequerboard of black & white squares I measured with BL dimming on MAX -
ANSI white - 124 cdm2
ANSI black - 0.07
All measurements were taken in a blacked out room.