Heres How I Feel About the canon 50's
1. The 50mm 1.4 is A Superb Lens. Its Fast, Its Cheap and Its AF is sweet. I've used it for many, many portraits and LOW LIGHT Situations. Know its limitations also, Its not sharp wide open and is best from F2.8 and UP. Its Stupendously sharp at F/8 and Resolves alot of details that you might have to do alot of photoshop to your clients faces.
2. Unfortunately, I needed a FAST Lens but Also, Sharpness Wide Open. Enter the 50mm 1.2L...The Monster, The Beastly, The Manly, Hunk Of glass that makes other 50mm's Tremble at seeing its bold Red Ring. Its a AWESOME LENS! Its really sharp wide open and only gets to its best by 2.8. After that the 50mm 1.4 is actually alittle sharper but thats not the point.
The Point is that At Wide apertures is where the 50mm 1.2L Stands alone in SPEED and Sharpness and COLOR! Color is great on this lens!
Anyway, I Ditched the 50mm 1.4 for a USED 50 1.2L I saw on Craiglist. Best Decision EVERRRRRRRRR!!!!
Heres an Example at small apertures since none were really posted.