It looks like you are using an ad blocker. That's okay. Who doesn't? But without advertising revenue, we can't keep making this site awesome. Click the link below for instructions on disabling adblock.
I am about to upgrade my camera to a 5Dmk3 in the near future and I was wondering if what I hear is true and there is a solid amount of vignetting when using this lens because it is made for APSC sensors???