A few days ago I got theCanon EF 70-200mm f/2.8 L IS II. []


I have been very pleased with it...But I have just today noticed at 200mm in the corners at f2.8 are somewhat soft. Stopping down to f5.6 seems to help some.


In the center it is not a problem, it is just in the corners.


Here are some crops from corners. I took them with my Canon Rebel XSi. Imanually focused them in the live view.





at f2.8


[img]/cfs-file.ashx/__key/CommunityServer.Components.UserFiles/00.00.00.46.81/IMG_5F00_9668.JPG[/img]


And at f5.6


[img]/cfs-file.ashx/__key/CommunityServer.Components.UserFiles/00.00.00.46.81/IMG_5F00_9667.JPG[/img]


Is it normal for theCanon 70-200mm f/2.8 L IS II to be soft in the corners at f2.8?


Here are a couple more crops.


At f2.8


[img]/cfs-file.ashx/__key/CommunityServer.Components.UserFiles/00.00.00.46.81/IMG_5F00_9702.JPG[/img]


And at f5.6[img]/cfs-file.ashx/__key/CommunityServer.Components.UserFiles/00.00.00.46.81/IMG_5F00_9701.JPG[/img]


Should I return my copy for a new one or not?


What to you think?


Thanks for any help!