Im in the market for a 35mm for my 5DMK3.. Out of the option which is best wide open for nice bokeh??
The critical part of the bokeh is when the blur is just a few pixels wide. Once the radius is large enough, you are not going to see much difference. Unfortunately, those are the typical examples of "good bokeh" often presented.
I would study the Flickr groups. IMO, Sigma pushed the design too much, and to gain sharpness, they compromised the bokeh. The Canon has its problems with the bokeh as well. To make things worse, the typical double lines might be maximized for radially oriented lines, and minimized for perpendicular ones, for example. So one comparison can be misleading.
I'm no expert on optical design, I only judge from what I see. If you could explain how sharpness ruins bokeh, it would be most appreciated. I don't see the connection.
1DXII, 5DIV, 5DSR, 8-15/4L, 11-24/4L, 16-35/2.8L III, 24-70/28L II, 70-200/2.8L IS II, 100-400/4.5-5.6L IS II, 200-400/4L IS 1.4x, 17/3.5L TS-E, 24/4L TS-E, 35/1.4L II, 100/2.8L IS Macro, 300/2.8L IS II, 600/4L IS II, Zeiss: 15/2.8, 35/1.4, 55/1.4 Otus, 85/1.4 Otus, Profoto B1