haha yeah i was just kinda bullshitting on that one, i bought it way back when i switched from my d90 over to my 7d and honestly didnt really look into the technical aspects of it. I just knew that it meant I could keep my $1600 Nikkor 80-400 and thats all that really mattered at the time. I was willing to spend that much.
However I will say that if you do intend to shoot at f1.8 its gonna be mad tough to know what is and isnt in focus when looking through the tiny viewfinder, especially in low light when the wide aperture is the most necessary.