Archived posting to the Leica Users Group, 2015/05/05

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Subject: [Leica] New M(246) Outputs 12 bit Files
From: abridge at mac.com (Adam Bridge)
Date: Tue, 05 May 2015 10:54:33 -0700
References: <CAAsXt4M8TOqVD30bX_TRpDr8Q6QDFXvZWTSSso2_PL6zdHUWsg@mail.gmail.com> <CAMk=+XWCtsT_eGOSCLZMSMP=SyxdTPbCEopcWTE7chvXnyAjGw@mail.gmail.com> <5548ECD3.6040900@lighttube.net> <CAAsXt4OmRRQ9NBFUyYMrdWm=uwJ6tFQgxPDBQsEU_9aTQohg2Q@mail.gmail.com> <5DAB6492-6B47-4620-A495-5D0943B49364@gmail.com> <CAH1UNJ005f-LZsi2290Kdg3mE6jqAoyuauqd0Fjf5w8BU=Yrng@mail.gmail.com>

In an image exposed so the lightest white is all the way to the right on the 
histogram then the darker parts of the image won?t have as much detail in a 
12 bit image as in a 14 bit image because it?s in the very dark regions 
where there are fewer bits available.

If the camera?s noise attributes don?t warrant 14 bits of detail then 
keeping at 12 would make sense since the noise in the darks wouldn?t be 
resolved.

In audio the difference between 12 and 14 bits in the sampling system would 
be obvious to many - probably even to me.

I?m a little troubled by the reviewer whose ?loyalty is to Leica?. I almost 
quit reading at that point even though he tried to make it better in 
subsequent sentences. 

Adam

> On 2015 May 5, at 9:50 AM, Jayanand Govindaraj <jayanand at gmail.com> 
> wrote:
> 
> 12 bit = 2 raised to the power of 12 = 4096 shades of gray
> 
> 14 bit = 2 raised to the power of 14 = 16384 shades of gray
> 
> Quite a bit of tonal difference technically. Whether the human eye can
> perceive it in a meaningful way in a print - who knows?
> 
> Cheers
> Jayanand
> 



Replies: Reply from rgacpa at gmail.com (Robert Adler) ([Leica] New M(246) Outputs 12 bit Files)
In reply to: Message from rgacpa at gmail.com (Robert Adler) ([Leica] New M(246) Outputs 12 bit Files)
Message from tmanley at gmail.com (Tina Manley) ([Leica] New M(246) Outputs 12 bit Files)
Message from jhnichols at lighttube.net (Jim Nichols) ([Leica] New M(246) Outputs 12 bit Files)
Message from rgacpa at gmail.com (Robert Adler) ([Leica] New M(246) Outputs 12 bit Files)
Message from steve.barbour at gmail.com (Steve Barbour) ([Leica] New M(246) Outputs 12 bit Files)
Message from jayanand at gmail.com (Jayanand Govindaraj) ([Leica] New M(246) Outputs 12 bit Files)