Archived posting to the Leica Users Group, 2008/05/06

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Subject: [Leica] Nikon Coolscan 4000 Users.... I need help!
From: msadat at gmail.com (mehrdad)
Date: Tue May 6 00:45:33 2008
References: <7061.14484.qm@web82102.mail.mud.yahoo.com> <002101c8af23$7dd6bb80$6b01a8c0@dadquad>

last time, i tried to open files via lightroom (dng from vuscan); the
size of th3 files were too big for LR on xp machine with 4 gig ram.
never tried acr, thought it would be the same

On Mon, May 5, 2008 at 7:47 PM, Geoff Hopkinson <hoppyman@bigpond.net.au> 
wrote:
> Since I was wrong and am now a reformed unbeliever, I feel obligated to
>  provide the information. My email does not accept chocolate attachments.
>
>  As Bob, says, the latest professional version of Vuescan software can save
>  scans as a .DNG file, which is a Raw file format, just like the files from
>  an M8.
>  If your scanner is 16 bit like the top Nikons (and you scan at 4000dpi) 
> then
>  you will get a very large .DNG. About a 100MB from a 35mm original, bigger
>  from medium format, obviously.
>  Once you have the scan as a DNG, then normal Raw converter progs should
>  work. This is a big leap compared to doing a conversion (to TIFF or JPG)
>  within Vuescan itself. In the interests of science I shall make some new
>  scans and have a play. I'll try with ACR 4.4.1 and LR2 beta.
>
>  Caveats:
>  Maximum quality defined by the actual dynamic range of the CCD in the
>  scanner as well as the originally captured dynamic range (film and 
> exposure
>  dependant). I suspect that the CCD signal to noise ratio may be a bigger
>  factor. Your scanners analog/digital converter will determine the quality 
> of
>  the 16 bits outputted too.
>  Those limitations may or may not be significant. Certainly worth some
>  experimentation. No question but that exposure and white balance 
> adjustment
>  in Raw is superior to any saved TIFF or JPG.
>  ACR has a default setting to ignore DNGs over, (I think) 200MB.
>
>  Other thoughts: If you have a computer with enough grunt to digest
>  quantities of DNGs of these sizes, then lossless compression in ACR (and I
>  guess LR) should shrink them down to a mere 50MB or so each from 35mm 
> scans!
>  Or buy an M8 and cut out the middle man.
>
>
>  Cheers
>  Geoff
>  http://www.pbase.com/hoppyman/e
>
> http://gallery.leica-users.org/v/gh/
>
>  -----Original Message-----
>
>
> Subject: Re: [Leica] Nikon Coolscan 4000 Users.... I need help!
>
>  DNGs are like RAW. Fully able to be manipulated in ACR or Lightroom 
> without
>  impacting the original scan. So you can always go back later to the DNG 
> when
>  the new HDR/UberDOF/3D/MegawideGamut becomes available. Also, you can play
>  with the white balance, which is, in my experience, more difficult to do
>  with a .tif file. ACR lets you do other stuff in RAW that you can't do
>  elsewhere, but I've never known enough to use it...
>
>  It's definitely not smaller; my tif files are about 100mb smaller than my
>  dng files (6x6 scanned at 4000dpi).
>
>  Like I said, though, Lightroom seems to freak with 550mb .dng files; 
> perhaps
>  Wade can give some insight...
>  Bob
>
>  Bob Adler
>  Palo Alto, CA
>  http://www.raflexions.com
>
>
>
>  ----- Original Message ----
>  From: Mark Rabiner <mark@rabinergroup.com>
>  To: Leica Users Group <lug@leica-users.org>
>  Sent: Monday, May 5, 2008 6:09:18 PM
>  Subject: Re: [Leica] Nikon Coolscan 4000 Users.... I need help!
>
>  > Careful Steve. Never come between me and my chocolate!
>  > :-)
>  >
>  > Bob Adler
>  > http://www.raflexions.com
>  >
>  > On May 5, 2008, at 2:42 PM, Bob Adler <rgacpa@yahoo.com> wrote:
>  >
>  > No Geoff. Here's what you do:
>  > Go to the Output tab
>  > Set Output RAW DNG format to on.
>  >
>  > The manual is a bit confusing, but if you go look at this it works.
>  > DNG format
>  > ACR usable
>  >
>  The DNG's are better in some way? Smaller? More compatibility with
>  Lightroom?
>
>  Mark William Rabiner
>  markrabiner.com
>
>
>
>  _______________________________________________
>  Leica Users Group.
>  See http://leica-users.org/mailman/listinfo/lug for more information
>



-- 
 -------------------------------------
 regards, mehrdad

In reply to: Message from rgacpa at yahoo.com (Bob Adler) ([Leica] Nikon Coolscan 4000 Users.... I need help!)
Message from hoppyman at bigpond.net.au (Geoff Hopkinson) ([Leica] Nikon Coolscan 4000 Users.... I need help!)