Support for Canon 5D Mark IV??

Discussions, questions, comments and suggestions regarding Capture One PRO, Capture One PRO(For Sony), Capture One DB and Capture One Express(For Sony) 10.x and 9.x

Re: Support for Canon 5D Mark IV??

Postby Christian Gruner » Sun Oct 23, 2016 9:22 pm

AT75 wrote:Hi,

what about this
http://www.rawdigger.com/howtouse/canon ... -are-there
will C1 support this ability to get additional stop from highligts in dual-pixel raws?


I have forwarded the link to the right persons, but a quick look using the same raw file, and it seems that CO already can recover just as much of the sky as in their best-case example.
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Re: Support for Canon 5D Mark IV??

Postby HansB » Mon Oct 24, 2016 1:18 am

AT75 wrote:Hi,

what about this
http://www.rawdigger.com/howtouse/canon ... -are-there
will C1 support this ability to get additional stop from highligts in dual-pixel raws?


Interesting. They state:
rawdigger.com wrote:...
suppose, neighboring A and B sub-pixels have a value of 8,000; ...
...
there is about a 2x (a stop) difference between the value 8192 in the A / B pixel sets
...

But with the same light on both of the dual pixels of a set and a factor 2 difference between the pixels in a set, it should be
'... neighboring A and B sub-pixels have a value of 4,000 and 8,000; ...'.

A pretty good way to confuse people.

rawdigger.com wrote:...
A Canon 5D Mark IV sensor contains two sets of pixels, A and B. Charge stored in pixels of each set is converted into a 14-bit value.
...
there is about a 2x (a stop) difference between the value 8192 in the A / B pixel sets
...
the main subframe containing sums of the values from the "A" and "B" pixel sets
...

The simple sum doesn't make sense to me.
8192 + 16384 = 24576. Simply adding them, one is clipping at 10922 and the other at 5461, for a 14 bit into 14 bit result.
And, even worse, with the bright pixel capturing a 50% brightness correctly as 8192, the sum would make it 8192 + 4096 = 12288, a 75% brightness.

I expect that combined(A,B) = ( 2*A + B ) / 2, or similar. Possibly way more sophisticated.


In the end I understood that the subframes can be used to create a 2-image HDR stack for highlight recovery.

But maybe I just didn't understand the article at all.


Regards,
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Re: Support for Canon 5D Mark IV??

Postby AT75 » Sun Apr 08, 2018 10:38 am

Will C1 finally support the benefits of dual-pixel raw? Already some individuals made this, why no support from C1?

https://www.dpreview.com/news/086869866 ... -raw-files
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