Is 5D3 jpg cleaner than D800 jpg in same size?

Started Apr 4, 2012 | Discussions thread
James Bligh
Senior MemberPosts: 1,546
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I find same result in ISO 3200 & 1600 as in ISO 6400.
In reply to James Bligh, Apr 4, 2012

James Bligh wrote:

I find 5D3 jpg cleaner than D800 jpg in same size comparison.

I downloaded ISO6400 D800 & 5D3 pictures from the above sites. Strangely 5D3 file is 1/3 size of D800 file.

Interior: 24.54MB, Aperture Priority, 1/20, f8, 6400 ISO, 50mm

Interior: 8.51MB, Aperture Priority, 1/15, f8, 6400 ISO, 50mm

I downsized D800 picture to the size of 5D3 picture (5760 X 3840) and it became about 16 MB (5760 X 3845) and compared two pictures. Despite the difference in file sizes and yes it is jpg vs. jpg comparison but 5D3 picture is much cleaner and D800 picture is definitely noisier than 5D3 picture in this same size comparison. What is your opinion about this? I am bewildered since many people have claimed D800 photos are comparable noisewise to 5D3 photos in same size comparison.

I find same result in ISO 3200 & 1600 as in ISO 6400.

I repeated equal size comparison of D800 & 5D3 ISO 3200 Interior shots as above and I find same result; See the textures of coffee machine and brownish red coffee cups above it. In ISO 1600 the difference is still there and visible though less pronounced as in ISO 6400 and 3200.

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