on 7/30/07 8:59 AM, Graeme Gill at email@hidden wrote:
> Dan Reid wrote:
>> Jim is correct that the rev. D is also using the new LED
>> illumination too.
> I don't believe this is correct.
Yeah, Terry corrected me. Thanks.
>> Just to makes things more interesting the HP z-series printers measure at
>> 20nm increments while the rev A-C (not sure about rev D) measure in 10nm
> Rev D is exactly the same. The main change is the faster sampling rate.
Yup, Rev D is also measuring 10nm increments too.
>> Also interesting to note GretagMacbeth devices always measured
>> in 10nm increments while X-Rite choose 20nm increments for their legacy
> Not correct. Most X-Rite devices (ie. DTP41 etc.) return measurements
> at 10nm spacing.
Uh, maybe but I don't think so. This is one of the many reasons why you
could never get GretagMacbeth and X-Rite devices to agree on measurements.
>> And if you are following all of this then you might be interested
>> to know the sampling of HP z-series is 400-700nm unlike the i1 which is
> X-Rite's instruments traditionally returned 400-700 in 10nm increments,
> while the Spectrolino and Eye-One Pro do 380-730 in 10nm increments.
> The underlying resolution of the Eye-One Pro is about 3.3nm spacing.
Right, you have that correct.
The original post was to state that the HP internal spectro is measuring
with a different resolution and illumination than typical eye one spectros.
Thanks for the clarification.
Dan B. Reid
Color Management Products and Training for Print, Internet, and Motion
http://www.rpimaging.com | Toll Free: (866) RGB-CMYK
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