Originally Posted by scorpio_87
From the review:Pioneer Kuro goes hunting ground. Panasonic 50VT20 realized the depth of black from 0.0004 cd/m2 (almost absolute zero) with illumination from 138.6783 cd/m2 calibrated to THX mode.
The result is a contrast 346,695.75 ANSI-a! Pioneer Kuro is, for comparison, hit 0.0031 cd/m2.
used a X-Rite Hubble
for their measurements, which is an excellent instrument for calibration, but not for black level measurement. According to the specs, the lowest luminance it can measure is 0.0099 fL.
When it comes to black level measurements, there are only a few instruments out there that are capable of measuring very low luminance levels. Here are two examples:Klein K-10:
0.00006 fL and up. Used by for example HDTVtest.co.ukKonica Minolta LS-100:
0.001 fL and up. Used by for example D-Nice (I think?)
Flatpanelshd.com have stated that their equipment can only measure from 0.0058 fL and up. Their black level measurements for Pioneer LX5090H and Panasonic VT20 are therefore quite useless (the other measurements, like color accuracy, may be good though).
IMO, this list should only contain results from serious and competent reviewers, who also have access to equipment that can measure very low luminance levels. At least for high-end plasmas and LCDs with local dimming. However, cheaper plasmas and LCDs with higher MLLs may not need super-high-end equipment for reasonably correct black level measurements.
Edit: corrected value for X-Rite Hubble