The A7r was overexposed by at least 1.5 stops, probably even more. Look at the yellow walls, pushed into pure blown white on the -R but close to 2 Ev down on the A7. User errors should not be blamed on lens/camera.
I do see a larger shift towards the absolute corner though, but you\'d do best to ignore the rest of the image.
I see that the link I posted stopped working, I think this will:
So not only is the color difference emphasized, there seems to be some odd arc in the A7r photos -- do you see what I mean? It should be pretty obvious. I find it very curious!
I have seen that posterized effect in a few A7r + adapted wide rangefinder shots, particularly when pushed to extremes as here. With extreme processing, that effect has also shown up with other Sony lossy raw images and I have wondered if it\'s at least partially due to the lossy compression going on. There is a lot of data being thrown out with the Sony lossy raws (non lossy sony raws from 24MP\'s are the same size as the current lossy 36MP raws for instance). Sony claims it\'s not visible but perhaps in extreme processing, it shows up where it might not with non lossy raws.
Thanks, I feel less crazy. But just a tiny bit less crazy.
But this leads me to wonder:
1) why don\'t I see a similar arc on the A7 shots? Sure, it might be a different hue, but I\'d expect to see it on both sides.
2) doesn\'t this mean there is \"less to recover\" in the A7r shots, so to speak?
The A7 plays better with rangefinder wides compared to the A7r so you will see more dramatic vignetting and color shifts with the A7r. That very well could be all we are seeing with over exposure in the center (meter compensating for the more extreme vignetting on the A7r)...but then there is definitely that arc of posterized color on the A7r. If it has nothing to do with the image processing (that\'s just a wild guess on my part regarding lossy raw), perhaps it\'s just an effect created by the major incompatibility between the lens and sensor on the A7r. If that\'s the reason, yes, it would be less recoverable using post processing with the A7r in this instance.
Edit, well Kent measured the blown area so over exposure may not be playing a role as much as simple lens/ sensor incompatibility.
Dec 02, 2013 at 09:32 PM
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