Canon 50mm f/1.4 sample images
Looks like you got a good 50mm F1.4 thats focus well on your camera.
I bought one last year spring and did not have luck with my two camera bodies focus issues as distance increase.
Sent it in three times to Canon Mississauga came back better but was not repaired properly.
Eventually Canon replaced it with a new one. Was much better but still had issues.
Sold it 2 days later with full warranty paper from canaon.
I had both bodies sent in for calibration too as all my other lens were focusing properly.
When the lens focused properly shot I got the lens was sharp from F2+
i'd be extremely frustrated if i had to experience what you had!