[alt-photo] Re: Densitometer vs Scanner

[Globe Trotteur]

Well, when i sample a value with my densitometer, sometimes it gives me a value of 1.2 and sometimes 1.19 or 1.21. Is that normal? I have the X-rite 810. I need to recalibrate it too. have not dione that in a while.So if i have 4 patches that i am sampling and they vary with 0.01, should I assume that they have the same values? The scanner will assume that.Thanks.PO
 > Date: Wed, 4 Jan 2012 09:10:08 -0700
> From: fdfragomeni at gmail.com
> To: alt-photo-process-list at lists.altphotolist.org
> Subject: [alt-photo] Re: Densitometer vs Scanner
> 
> I have both my X-Rite densitometer (can't remember which model but it is
> both reflection and transmission) and the densitometer (which is produced
> my X-Rite as well) in my Epson V750Pro scanner and while the Epson is a
> great piece of technology and I love it as a scannner, my X-Rite
> densitometer is a precision machine designed for one specific purpose and I
> carefully keep it calibrated. I trust my X-Rite densitometer far more then
> I'd trust the densitometer in the scanner when it comes to the most
> important things.
> 
> If you have a trusted densitometer and you keep it calibrated I would
> probably go with that one. The densitometer in the scanner is more then
> capable and an excellent option for anyone who doens't already own a
> trusted dedicated densitometer but it is just a different piece of
> technology and is not a dedicated and maintained device (meaning you
> actively keep it calibrated in the same way that you would with a dedicated
> device). My $0.02, other's may have other opinions.
> 
> -Francesco
> 
> On Wed, Jan 4, 2012 at 8:33 AM, Globe Trotteur
> <unglobetrotteur at hotmail.com>wrote:
> 
> >
> > While calibrating the new Ilford Art paper, i tried both with my
> > densitometer and my scanner. Now my question is, which one is more
> > accurate.My X-rite densitometer is showing different values for pure white
> > than the scanner does. It could be that the textured paper is affecting the
> > readings.Which method should I trust more?Thanks.Pierre-O
> >
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