So, from the arguments presented, anything that "breaks" the incoming spectra into small bins is bound to receive "less photons", in all, in each bin? Whereas colorimeters are usually designed with "large collecting areas", which allow them to collect "more'" photons ", more rapidly or, at least, to collect whatever available photons more rapidly? / Roger -----Original Message----- From: colorsync-users <colorsync-users-bounces+graxx=videotron.ca@lists.apple.com> On Behalf Of Pat Herold via colorsync-users Sent: December 10, 2019 3:33 PM To: colorsync-users@lists.apple.com Subject: Re: i1Pro and monitors I would not choose to use the term “less reliable,” but I think I understand what they are trying to say. Spectrophotometers like the i1Pro measure all bands of human perception at 10 nm increments. Colorimeters measure 3 colors. This measuring of 36 bands instead of 3 is what’s blamed for the i1Pro not being able to measure as black as a quality colorimeter. There’s just more noise in attempting to measure light on a dark display. Every little wisp of light gets picked up by the spectro. This is one reason why the basICColor DISCUS was valid as an instrument for monitor profiling. At over $1000, it was a very good quality colorimeter - but it was a true colorimeter, not a spectrophotometer. http://www.colorwiki.com/wiki/Profiling_Devices_for_Monitors <http://www.colorwiki.com/wiki/Profiling_Devices_for_Monitors> Pat Herold CHROMiX
On Mon, Dec 9, 2019 at 4:34 AM Roger Breton via colorsync-users < colorsync-users@lists.apple.com> wrote:
I was up on some popular UK web site dealing with monitors galore (tftcentral) and I stumbled on this comment, which made me pause : "An X-rite i1 Display Pro colorimeter was also used to verify the black point and contrast ratio since the i1 Pro 2 spectrophotometer is less reliable at the darker end.". Does this make any sense to anyone, here?
I'm into metrology over my ears, these days. So I'm especially sensitive to comments like that.
/ Roger
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