On my 5d3:
ls -s */*/*.CR2 */*/*.cr2 | cut -d' ' -f1 | sort | cut -c1,2 | uniq -c
1 11
1 21
15 22
383 23
1107 24
1218 25
877 26
592 27
465 28
329 29
194 30
138 31
84 32
40 33
47 34
39 35
15 36
11 37
7 38
9 39
2 40
3 41
3 42
The first one is a photo to white sheet with extreme out-of-focus (to check
sensor).
The theoretical size should be 22.1 MPixel * 14 / 8 = 38.7 MB (megapixel on
sensor * bits per pixel / bits per byte). Additionally jpg images and
additional information are saved on the raw file (but 4 MB of additional
information seems extreme. I'll check).
ciao
cate
On Wed, Apr 23, 2014 at 8:54 AM, Bastien OVCAR <[email protected]>wrote:
> Hello,
>
>
>
> Yes I do confirm that the size can be much different.
>
> With my Nikon D300s the RAW (NEF) files can b... let me think, about 11 MB
> or 20 MB, approximately.
>
> Don't worry about this, this is quite normal.
>
>
>
> Regards,
>
> Bastien
>
>
>
> Le 22.04.2014 23:47, David Vincent-Jones a écrit :
>
> Canon does use (lossless) compression in their raw files and files can
> vary widely depending on the subject matter. Shoot an image with lots of
> blue sky and you will be amazed at just how small the raw data is.
> Looking at random in my files I see a 25% variation even in quite normal
> data sets.
>
> Canon offers a 'safe average' value of file sizes to provide some sort
> of rough yardstick for fitting images onto a disk. Not to worry!!
>
> David
> On 04/22/2014 01:22 PM, Wolfgang Mader wrote:
>
> Hello list, I see different file sizes roughly from 22Mb to 31Mb for the
> RAW files of my Mark III. The manual is explicit and states a file size of
> 27.1Mb. I would have guessed that RAWs are always of the same size, since
> no compression is done. Can someone who has access to a 5D Mark III please
> comment on this? Thank you. Best, Wolfgang
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