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

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Subject: [Leica] M9 gotcha
From: images at comporium.net (Tina Manley)
Date: Sun, 27 Oct 2013 14:45:46 -0400
References: <682AEF14A4CABCC240025B87@Visible-Trout.local>

As far as I can tell, the M240 does not do this with the compressed DNG
files.  If anybody knows otherwise, I would like to know!  The manual says
compressed DNG is lossless.  I hope they are right!  Experimentation later.

Tina


On Sun, Oct 27, 2013 at 10:45 AM, Brian Reid <reid at 
mejac.palo-alto.ca.us>wrote:

> This weekend I learned, the hard way, that if you ask an M9 to produce
> compressed DNG files it only keeps 8 bits per pixel. If you want the full
> 14 bits per pixel that the sensor records you have to store uncompressed
> DNG.
>
> I didn't read the documentation as closely as i should have. Not that the
> documentation is explicit about this. On page 174 of the English-language
> manual it says that DNG compression is achieved "by non?linear reduction of
> color depth".
>
> Foo. Next time I'll get this right.
>
>
>
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-- 
Tina Manley
http:// <http://tina-manley.artistwebsites.com/>www.tinamanley.com


Replies: Reply from mark at rabinergroup.com (Mark Rabiner) ([Leica] M9 gotcha)
In reply to: Message from reid at mejac.palo-alto.ca.us (Brian Reid) ([Leica] M9 gotcha)