Quote Originally Posted by Sean Setters View Post
But on that note, what's the point in having a 50MP body if you're just going to downsample every picture to the size of the 5D III's files? And if you instead crop the image instead of resizing/resampling, the result will be more visible motion blur at the same pixel dimensions (with a tighter framing, of course).
The point is having the extra mp available to utilize. I wouldn't talk to other peoples photography but with mine almost every picture is downsized. If I shoot it with the 5D II or the 5Ds R almost all end up at the same size. I crop it to taste and then post it for view on the net. Or I print to a specific size. The 5Ds R gives the option to print a bit larger or crop a bit more. That only happens occasionally.

Quote Originally Posted by Sean Setters View Post
If you shoot the exact same scene with both the 5Ds and 5D Mark III bodies, with the same exact movement happening with each shutter click, then the movement recorded will cross more individual pixels with the 5Ds compared to the 5D Mark III. In that way, more motion blur is recorded.
If this is true then shouldn't we see this in equally framed same size pictures from both bodies? I am not seeing anything out of the ordinary in my work that makes me think it is worse. To the contrary I am seeing improvement at different levels due to the increased resolution. I know the smaller pixel and motion blur theory is nothing new, its been around for some time. But now I have a body with twice the resolution and the theory isn't holding up in real world shooting.

I am not saying that the smaller vs larger pixel theory doesn't hold merit at a certain level. I am saying that in real world shooting it is not making a noticeable difference.

First the statement I believe is correct; To fully utilize the additional resolution of the 5Ds R one will have to use faster shutter speeds or tripod.

Second the statement I believe is incorrect; The 5Ds R requires a faster shutter speed than the 5D III to avoid camera shake.