Use the f/1.0L USM lens for that perfect shot, Regardless of closeness or distance, it's as easy as taking candy from a baby.Try eBay

The EF50mm f/1.2L USM lens is sharp especially at f/1.2L and it continues to get sharper as it goes down to several stops! Buy At Amazon
The image produced by the EF50mm f/1.4 USM creates a natural blur for the background. The lens is also great in low light. Buy At Amazon