Just got 50mm f1.4, bout 3 days back...used it that same day without the hoya filter i got bcoz was given wrong size. But after went back to change and went for shot at night with it, i notice some sort of flare distortion, so thought it was the filter fault... then went home discovered that the flare distortion is from the lens itself!! The filter makes it more obvious...sigh.
Gonna go down to canon CSC to have it check out..coz i cant see any, smudges on the lens under normal lighting.
P.S: Or is it this lens cant shoot direct at lights? Eg: LED light directly?