beepbeep that is a cool shot.
looks like the water main acces hole cover for the city in your front yard.

it is sharp for the lens you used and it looks like the 2 full stops you corrected it with did the trick.

dont get used to soft shots, understand the camera and settings and many times, the abilities of the lens you have and you can get some great shots.
and also proper sharpening techniques with photoshop.

you did good man its a neat picture. and you did it justice by making it black and white!