Well, I am obviously wrong on that point. I see from this reference
<http://www.ppmag.com/reviews/200502_rodneycm.pdf> that some greens and
blues on a four color press can extend outside sRGB as can some "photo
printers" which I take to mean high-end ink jets.
But I don't own a high-end ink jet, most of my prints are done in a lab
that only does sRGB and all I can see on my display is sRGB. I think I
will convert to using ProPhoto RGB for editing in ACR to avoid
unnecessary color loss but will revert to sRGB for final output. If I
can't see it I didn't lose it.
Chuck Norcutt
Andrew Dacey wrote:
> I've actually seen screenshots from ColorThink (a program that maps
> colour spaces in 3-d) that demonstrate that some printers do have
> gamuts that extend outside of sRGB, and even Adobe RGB in certain
> parts of their gamut.
>
> On Feb 20, 2009, at 11:35 AM, Chuck Norcutt wrote:
>
>> The rationale for using Adobe RGB is as an editing space and not as an
>> output space. That's what it was designed for. It's analagous to
>> using
>> 16 bits for editing but 8 bits for output. You use 16 bits during
>> color/brightness editing to minimize round-off errors of integer
>> division. While you're doing editing the colors can go out of
>> gamut for
>> sRGB but have a better chance of being preserved if using Adobe RGB.
>> Some monitors may be able to display outside the sRGB space but I
>> don't
>> think any printing technology can display outside the sRGB space.
>>
>> In PhotoShop, if you shoot raw, you can choose to edit in any space
>> including Adobe RGB or (probably better) ProPhoto RGB. ProPhoto
>> RGB is
>> also an editing space. But when it comes to final output I choose
>> only
>> sRGB. Most of my prints are done in a lab which (like most) only
>> prints
>> from sRGB. If you don't convert it yourself they'll do it for
>> you. I'd
>> like to see it in converted form before I send it.
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|