All lenses tested on 5D camera, pointed at a wall about 6 feet away.
All lenses were tested wide open (f/1.4 for 35L and 50 f/1.4, f/1.2 for 85L).
Center is the only thing guaranteed to be in focus; I suspect there was a mild slant to the camera axis relative to the wall, because all three original photos are slightly softer on the right than the left, and both sides are sharp at f/5.6 with all lenses.
I just received my 50 f/1.4 today and have been examining its IQ output when compared to my other most-used lenses, the 35L and 85L. The 50 f/1.4 does exhibit that same halation everyone knows about under some circumstances, but the detail is still there.
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The 85L has a narrower DoF than the others, so the left and corner shots should be softer if they were not on the focus plane.
All in all, I think the 50 f/1.4 does a really good job with sharpness wide open. Bokeh is another story; there may be a bit of jitter, but I have not compared that characteristic to the 35L (or 85L, but I expect it to be ultra-smooth) so I can't say if it is any worse.


