Tack Sharp? (Not what it seems) {B&W}

[yanchula81]

I hate the term "tack sharp." I saw someone say their lens was tack sharp, and it made me think of a tack I use to change the pins in my watchbands. It is quite worn now. But it is a tack, so any level of its sharpness makes it "tack sharp." I hope you like my little interpretation. To me I just say my lens is sharp, and if it is really good I say its "very very sharp."

http://www.flickr.com/photos/yanchula/3271829004/

http://farm4.static.flickr.com/3401/3271829004_834322b70e_b.jpg