Archived posting to the Leica Users Group, 2012/08/12

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Subject: [Leica] OT - those thinking of a 36MP camera.....
From: lew1716 at gmail.com (Lew Schwartz)
Date: Sun, 12 Aug 2012 08:54:51 -0400
References: <80F9701439F20347874CE5E4E03C22E990E83000@WhizzMAIL01.whizz.org> <CC4CF95A.1B02F%chris@chriscrawfordphoto.com> <CAH1UNJ15tOz9Pb74G3ntCVS3C1v9YTeuQ3d3KTRyROzsNggd-g@mail.gmail.com> <000001cd787a$a81fec20$f85fc460$@chiaroscuro.co.nz>

Every io cycle on a compressed file has to go through another layer of
software to handle the decompression.

On Sun, Aug 12, 2012 at 7:07 AM, John McMaster <john at chiaroscuro.co.nz> 
wrote:
> Might be the compression (14 bit) then, this is in LR4.1, may try some
> uncompressed.....
>
> john
>
> -----Original Message-----
>
> I have no problem on my Win7 machine with 16 GB RAM with uncompressed 14 
> bit
> D800E files (75-80MB).
> Cheers
> Jayanand
>
> On Sun, Aug 12, 2012 at 3:41 PM, Chris Crawford <
> chris at chriscrawfordphoto.com> wrote:
>
>> You've got your RAM maxed out, then. I wonder why D800 files are so
>> cumbersome when you find that 500mb Hasselblad scans aren't? That's weird.
>> I haven't got a D800 to try it with, but my Canon 5DmkII files process
>> fast enough.
>>
>> --
>> Chris Crawford
>>
>> On 8/12/12 3:51 AM, "John McMaster" <john at mcmaster.co.nz> wrote:
>>
>> >I have dealt with 500MB 'blad scans with no issue. For those who care
>> >I have 32GB RAM, SSD and RAIDed eSATA so no slouch, D800E files are
>> >much slower to process....
>> >
>> >How do you find them in the Windows space Jayanand?
>> >
>> >john
>> >________________________________________
>> >
>> >
>> >I have a Mac Pro with dual quad-core processors. Mine are 2.8ghz. I
>> >work with scanned film, which gives much larger files than a 36mp
>> >camera. 16bit RGB scan of a 35mm neg is 128mb and a 6x6 neg is 470mb.
>> >That's with no editing or layers, which make the files a lot bigger. My
> machine is FAST.
>> >I have not looked at it to see the % of CPU being used, but I know it
>> >runs filters and stuff extremely fast. Almost instantly on 35mm and
>> >in a few seconds on the giant medium format scans.
>> >
>> >My processors are not that much faster than yours, but I do have 12GB
>> >of RAM. I wonder if more RAM would help you, it did speed mine up
>> >quite a bit when I upped it from 4 to 12 GB.
>> >
>> >--
>> >Chris Crawford
>> >
>> >On 8/12/12 3:04 AM, "John McMaster" <john at chiaroscuro.co.nz> wrote:
>> >
>> >>It is far slower to work on D800E (lossless compressed) 40MB files
>> >>than
>> >>M9
>> >>(uncompressed) 36MB files.
>> >>
>> >>I have a reasonably grunty machine so I went looking at what the
>> >>bottleneck is......
>> >>
>> >>Mid-2009 Mac Pro (2x 2.26 quad-core Intel 5520 CPU) was running at
>> >>over 1300% CPU (16 threads available) briefly while doing minor
>> >>changes, be aware of this limitation if thinking of upping your
>> >>camera MP ;-)
>> >>
>> >>john
>> >>
>
>
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information



-- 
-Lew Schwartz


Replies: Reply from john at mcmaster.co.nz (John McMaster) ([Leica] OT - those thinking of a 36MP camera.....)
In reply to: Message from john at mcmaster.co.nz (John McMaster) ([Leica] OT - those thinking of a 36MP camera.....)
Message from chris at chriscrawfordphoto.com (Chris Crawford) ([Leica] OT - those thinking of a 36MP camera.....)
Message from jayanand at gmail.com (Jayanand Govindaraj) ([Leica] OT - those thinking of a 36MP camera.....)
Message from john at chiaroscuro.co.nz (John McMaster) ([Leica] OT - those thinking of a 36MP camera.....)