My F 50mm 1.7 looks like cr*p.
It has no filter ring, the whole F line is tacky looking (in my opinion) and there is oil or residue all over the edges of the front element....
BUT
I love the lens at any F stop...
I always stayed away from wide open with the 1.4, but I love using it in the 50mm 1.7.
Here are two shots.. the first at 1.8... but I am going to classify it as wide open :P
This one is a new favorite of mine.
at 1.7
Comments and criticisms appreciated!