Originally Posted by bobof
Playing the devils advocate here; I am yet to see ANY hard information which says what the quality of measurements of ANY of the above meters is at 2000 nits...
Or even 1000 nits...
X-Rite has never released at public any specification for their i1Display PRO, only a PDF specs
we have found from VPixx is available for the meter. Also the LightIllusion site was the first one which informed about that 2000nits change, if you search any store, you will not find that info, Steve has contact the manufacturer since it's Official OEM meter dealer, so he got that info from first hand and officially.
i1Display PRO is a consumer device, low-cost, they do at their factory in China some kind of tests to keep the performance differences of unit-per-unit low, but as you have seen for example the C6 (which is nothing more that a branded OEM i1D3 from hardware side of view)...some of them can read up to 1300, others up to 1200 or 1100, this is fine for a meter which the company's specs say that they have luminance range up to 1000 nits to do a bit more.
The same is happening from any i1Display PRO Rev A/Rev B 2016), it's up to unit-to-unit variation to read 1000/1100/1200 max. 1300, since SpectraCAL is naming the ones can do up to 1300 nits as C6 HDR.
The specifications for meters per each luminance range is something ultra reference hi-end meters are posting (like Minolta
), which coming with NIST certifications of a lot of testing at various different calibration lamps and cost some thousand dollars, for normal meters of consumer market which don't come with any proof of performance it's impossible to wait for such advanced testing, detailed spec per luminance range.
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