Thanks everybody for the feedback!
Thanks mate, I will surely do that as soon as possible

Still I think I could have done a little better, that pic is a bit offset to the right and maybe not perfectly horizontal. There's always room for improvement!
I'd like to add a note about the Tokina. This is a 100% crop of the top right corner of a picture.
Now tell me it's not sharp

http://i51.tinypic.com/1z4h891.jpg
11 mm
f/11
1/3 second
It seems like it can be sharper, i'm looking thru my own catalog as i think the tokina is capable of more