As f1.2 lenses go, it would seem that the Canon's have the best value going. I only have this in a Pentax and Minolta lens but I would anticipate the quality of their build and their outstanding results compared to their f1.8 & f1.4 stablemates will be the same for Canon. That being said, they provide unmatched ability to isolate subject matter and typically better bokeh.
Originally Posted by MartinCrabtree
KEH's warranty makes any purchase worry free and it has been my experience that they usually underrate their items.