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-   -   E-M1 and Canon 7D RAW file comparison (https://e-group.uk.net/forum/showthread.php?t=31118)

David Morison 14th January 2014 02:10 PM

E-M1 and Canon 7D RAW file comparison
 
As my M1 is away in Portugal having a tiny bit of rubber stuck back on under warranty I have been using my 7D mainly for birding and E-PL3 for other subjects. Ever since I've had the 7D I've noticed that on first examination of the RAW file representation in LR the images appear softer and less contrasty than those from the M5 and M1, but that with post processing it is much easier to achieve a satisfactory result than with the OMD files. I can't explain why this is, the OMD files are less noisy than the Canon files but the noise appears more angular and more difficult to reduce without over-smoothing, whereas the Canon noise is more predictable. This is more apparent when a degree of sharpening is applied, especially as the Canon files need in general to be sharpened more.

Anyone with any experience of this or any views on it? When I get the M1 back I will try to do a comparison to post here.

David

Chevvyf1 14th January 2014 03:54 PM

Re: E-M1 and Canon 7D RAW file comparison
 
I find that CO Pro 7 is the best for ONE raw files at the moment. Corel is ok most of the time but ... lacking sometimes :) OLY3 is not bad but not a patch on CO Pro 7

Sorry thats all I can say :(

I was hoping you had taken a bird with both cameras for a direct comparison here :(

Daveart 14th January 2014 03:59 PM

Re: E-M1 and Canon 7D RAW file comparison
 
Hi David I have come to simular conclousions, my theory is the OMD files are more like film grain than digital noise, but interestingly I have printed a AŁ print of a iso6400 witout any noise reduction even though it showed as noise on the screen at 100% view, but the print did not show any noise pattern at all, so I came to the thought that it is not actually noise as we know it, as I see it if it dont show at 60% viewing size on the screen then it aint gonna show in print.

Dave

Ian 14th January 2014 04:30 PM

Re: E-M1 and Canon 7D RAW file comparison
 
Quote:

Originally Posted by Daveart (Post 274164)
Hi David I have come to simular conclousions, my theory is the OMD files are more like film grain than digital noise, but interestingly I have printed a AŁ print of a iso6400 witout any noise reduction even though it showed as noise on the screen at 100% view, but the print did not show any noise pattern at all, so I came to the thought that it is not actually noise as we know it, as I see it if it dont show at 60% viewing size on the screen then it aint gonna show in print.

Dave

Of course on-screen viewing is important these days but when it comes to prints I always find that this medium is more forgiving!

Ian

David Morison 14th January 2014 05:19 PM

Re: E-M1 and Canon 7D RAW file comparison
 
Quote:

Originally Posted by Chevvyf1 (Post 274162)
I find that CO Pro 7 is the best for ONE raw files at the moment. Corel is ok most of the time but ... lacking sometimes :) OLY3 is not bad but not a patch on CO Pro 7

Sorry thats all I can say :(

I was hoping you had taken a bird with both cameras for a direct comparison here :(

Tried CO Pro7 and don't like it as much as LR. Snapheal, which is Mac specific and a very simple piece of software gives better sharpening and NR than LR but doesn't seem to preserve the Exif as far as I can make out.

When I get the M1 back from Olympus I will try to do a comparison. Interestingly E5 ORF is easier to deal with than M1 ORF with my limited skills.

David

Gwyver 14th January 2014 06:40 PM

Re: E-M1 and Canon 7D RAW file comparison
 
Quote:

Originally Posted by David Morison (Post 274142)
...I can't explain why this is, the OMD files are less noisy than the Canon files but the noise appears more angular and more difficult to reduce without over-smoothing, ...

David

I only use use LR & have no experience of Canon files but have noticed this sort of 'grittiness' in ORFs ever since changing from E-3 to E-M5 and now also with the E-M1. It can be very noticeable in Landscapes containing areas of rough vegetation in the mid-distance and the balance of sharpening/NR is trickier than for E-3 files.
I had assumed that the cause is reduction/removal of the AA filter in the OM cameras and possibly the change in Moire removal algorithms in LR4 & 5.

photo_owl 14th January 2014 07:28 PM

Re: E-M1 and Canon 7D RAW file comparison
 
this is an interesting question David, but it's more difficult to answer.

there are so many elements at play

as Chris observes, those who moved into the E3 (then out again :)) saw this the other way round! fundamentally you got soft files that responded fantastically to subsequent processing.

the e510 produced the opposite.

the AA filter is one of the few elements that delivers to the RAW file, and therefore gets the main focus when considering the RAW file output.

if you deliver consistent processing to files from cameras with significantly different AA filters then you will get different outputs - in many ways if you provide sympathetic processing settings you will get similar outputs (within a general range of subjects).


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