Digital BW, The Print

Paul,

This is not quite on point with the thread, but perhaps you can shed some
light.  I recently did a project in CRW, converted to 16-bit tif.  The
printer wanted me to do the CMYK conversion according to their press specs,
which I did.  The design consultant says the CMYK images have excess noise
when converted from 16-bit to 8-bit to lay out in Quark.  I said fine, I'll
convert the 16-bit RGB files to 8 and send to you, and you can have the
press do the CMYK conversion.  I'll be there with match prints at the press.
The design consultant indicates that any conversion from 16 to 8 adds noise
and banding because an extra 1/2 bit of noise is introduced in the PS
conversion, and that for press work it is preferable to shoot in 8-bit jpg
initially.  Well, there goes my custom white balance (WhiBal cards applied
to the same image in Capture One).  I tried these conversions and on my
screen (OptiCal calibrated LCD) could see no differences of any kind.  Do
you or others on the list by chance know if this is BS or if there is
something I'm missing?  Thx for any help.

Best regards,

Ken Carney
www.kencarney.com


> -----Original Message-----
> From: DigitalBlackandWhiteThePrint@yahoogroups.com 
> [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On 
> Behalf Of Paul D. DeRocco
> Sent: Monday, July 04, 2005 8:59 AM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: RE: [Digital BW] jpg vs. raw
> 
> > From: Wendel White
> >
> > The point was not that .TIF and .RAW are the same, it's that some 
> > camera companies gave the RAW files a .TIF extension. My Canon 1Ds 
> > saves RAW files as .TIF even though they are not really TIFF files.
> 
> Actually, they probably are TIFF files, just not the kind 
> most software expects. TIFF is a packaging format for image 
> data, and can encapsulate anything including proprietary 
> data. In that respect, it's like AVI for video files. You can 
> wrap JPEG compressed data in a TIFF file if you want.
> And indeed, the new Adobe DNG format is a TIFF file. It's 
> just that the most common use of TIFF is to wrap uncompressed 
> or losslessly compressed image data, so that's all most 
> software supports.
> 
> --
> 
> Ciao,               Paul D. DeRocco
> Paul                mailto:pderocco@...