Archived posting to the Leica Users Group, 2013/10/27

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Subject: [Leica] M9 gotcha
From: red735i at verizon.net (Frank Filippone)
Date: Sun, 27 Oct 2013 21:27:36 -0700
References: <682AEF14A4CABCC240025B87@Visible-Trout.local> <CAE3QcF52cWiDbTy5Zyc89-GwJF1mRt+x3Y2DiVWXtZrtbV8+Fg@mail.gmail.com> <0b4b01ced35e$30294280$907bc780$@verizon.net> <CAE3QcF7iY-9-8hYQwYPg=zozJi7KkUqsN=EouRqTvDw9sjkVZQ@mail.gmail.com> <0b6201ced368$40ec2380$c2c46a80$@verizon.net> <80F9701439F20347874CE5E4E03C22E9D0D68C3F@WhizzMAIL01.whizz.org>

John... what is the file size difference between a compressed and
uncompressed capture?

Frank Filippone
Red735i at verizon.net

The M has uncompressed or lossless compressed, I have just looked at the
sizes of the latter - most are 20MB-25MB but some are larger or smaller.

> -----Original Message-----
> 
> The M does or does not have compressed data files ( by selection)?
> 
> I got my M9 about a year ago... no M in my future, for now....  I have 
> shot everything in RAW Compressed....
> 
> Frank Filippone
> Red735i at verizon.net
> 
> 
> Well it's a four year old discussion Frank. Some people never used the 
> compression but ask any of us to actually demonstrate the difference 
> in photos and we cannot.
> The M with much greater processing power has not used this option.
> 
> 
> > Geoff... if it is either 8 bits or 14 bits, and you then process the 
> > image in LR or CS, what data is LR or CS working with?  8 bits, or 
> > during file opening, the data is decompressed from 8 bits back up to
> > 14 bits and then you are working with 14 bit data?
> >
> > The issue to me is the quantization level achievable in the post 
> > processing.....
> >
> > Frank Filippone
> > Red735i at verizon.net
> >
> >
> > Brian, anecdotally most M9 shooters use that compressed option, 
> > although I didn't personally.  Of course, with the M8 it was the 
> > only option. The key is that it is non-linear compression. If you 
> > like I'll send you a copy of the LFI explanation of the mechanism.
> >
> >
> > Cheers
> > Geoff
> 

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Replies: Reply from john at mcmaster.co.nz (John McMaster) ([Leica] M9 gotcha)
In reply to: Message from reid at mejac.palo-alto.ca.us (Brian Reid) ([Leica] M9 gotcha)
Message from hopsternew at gmail.com (Geoff Hopkinson) ([Leica] M9 gotcha)
Message from red735i at verizon.net (Frank Filippone) ([Leica] M9 gotcha)
Message from hopsternew at gmail.com (Geoff Hopkinson) ([Leica] M9 gotcha)
Message from red735i at verizon.net (Frank Filippone) ([Leica] M9 gotcha)
Message from john at mcmaster.co.nz (John McMaster) ([Leica] M9 gotcha)