[argyllcms] Re: help with camera profile
- From: "Alan Goldhammer" <agoldhammer@xxxxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Wed, 01 Aug 2012 08:58:07 -0400
The Passport has software that does this for you. You need to buy it.
-----Original Message-----
From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx]
On Behalf Of adam k
Sent: Wednesday, August 01, 2012 8:56 AM
To: argyllcms@xxxxxxxxxxxxx
Subject: [argyllcms] Re: help with camera profile
Alan,
How do you calibrate camera in LR4?
Thank you!
A Kielcz
On Aug 1, 2012, at 8:51 AM, Alan Goldhammer <agoldhammer@xxxxxxxxxxx> wrote:
> Yes, the Passport does contain the identical patch, it's just more
> convenient and it also has some other valuable tools. You can also
> use the X-Rite software and Adobe Lightroom to do a camera calibration
> which will be specific for your camera. The effects are quite subtle but
noticeable.
> With respect to the dynamic range of the camera, yes this can be an
> issue which is why so much has been written about exposing to the
> right (ETTR) so that you move the histogram more towards white
> clipping. The problem is that the camera manufacturers set the
> software to render the histogram as they see fit and you may end up
> losing 1/3 to 1 full stop of information this way. Two ways to get
> around this are 1) bracketing so that you get several images with a
> range of exposures or 2) setting your camera up for Uni-White Balance
> (UniWB) that will counter what the camera maker has set up. You can
> also extend the dynamic range by HDR as long as you don't go overboard
> with wild colors. Photoshop can do this and there are other shareware
software packages as well.
>
> Alan
>
> -----Original Message-----
> From: argyllcms-bounce@xxxxxxxxxxxxx
> [mailto:argyllcms-bounce@xxxxxxxxxxxxx]
> On Behalf Of Alberto Ferrante
> Sent: Wednesday, August 01, 2012 7:03 AM
> To: argyllcms@xxxxxxxxxxxxx
> Subject: [argyllcms] Re: help with camera profile
>
>
> I was actually planning to get a ColorcheChecker Passport: it has
> pretty much the same price and it could be useful to me not only for
> checking the profile. If I understood well, the 24-patch "classic"
> target should be the same as the standard 24, just smaller... Is that
correct?
>
>
> A question I was asking myself: cannot the problems with
> shadows/highlights be related with the dynamic range of the camera?
> Specifically, the dynamic range of the target is roughly 8 stops (gray
> patches from full black to full white on paper). Most cameras, in raw,
> can register more than 8 stops of dynamic range and, therefore, the
> model built in the profile will not cover directly the missing parts
> (it may cover them through some kind of interpolation, that may not
> correspond to the reality)... Am I wrong?
>
> Thanks again for the great help!
>
> Regards,
> Alberto
>
>
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