[sbogar]

The Canon vignets more gradually (less noticable because of the more gradual character). In the extreme corners the vignetting is about the same

http://www.the-digital-picture.com/Revie...nsComp=751

 

Great link! Thanks, Brightcolours.

 

One thing is unclear from the figures: what is the size of the entire box, and what is the size of the light gray rectangle inside?

Axis labels, tickmarks, explanation are missing, plus the "?" link at  the top of the page is broken.

 

 

Whether that is a good thing for your application, no idea.

Since you use such a large sensor, maybe you should look for a medium format lens?

 

There isn't any medium format lens I know of (in production) at the f/2 or faster range and ~200mm focal length.