A typical question to ask in regards to this lens...
Is the 50 f/1.2 softer than the 50 f/1.4? I currently own the 1.4 and love it, but I am curious if the IQ from the 1.2 is worth the upgrade. I am currently shooting with a 5D mk ll.
I have both the 50 f1.2 and the 50 f1.4. My use is mainly portrait and I usually shoot at apperture between f1.2 and f5.6 with my 50 f1.2. I have not made the test at aperture smaller like f6.3 or f8, but i can say from my own experience (again I am just a smaple of one) I concure with an earlier comment that the 50 f1.2 for my application has much better color, contrast and is very sharp.
Everytime I put back the 50 1.4 on my camera (5D mkII) I cant beleive how washed out and boring the image look compared with the 50 1.2 and the images requires more software processing afterward. I dont usually do landscape but I actually did a few golf course shot with both lens a few weeks ago and the 50 1.2 won hands down - again I was shooting below f8.
I am not a pro photographer, I am just an amateur, but for me the 50 1.2 has proven a very good investment and dont regret ever buying it. I know it gets mix review sometime but for me it works.
I am actually putting my 50 1.4 for sell cause I never use it...