if by magnified, you mean stretched out, then yes, the FOV is the culprit. this is present in most games to some extent. the above post is exactly right, try to edit some config files and make the FOV bigger.
or, an outside the box solution: rotate your monitors to portrait orientation, then you'll have 3240x1920. the aspect ratio would still be comparable to a single monitor, which would alleviate the FOV stretching, but it would still give you a very high resolution. it's not for everybody, but its an alternative if you can't live with the stretching
not my pic, pulled it off google-