This is strange, this is the 2nd 50 1.4 I have owned. The first one I bought as an upgrade to my 50 1.8 II over a year ago, but found that images didn't have the contrast and detail that my 50 1.8 had so I sent the 50 1.4 back to Amazon.
Recently thinking that maybe it was user error or a bad copy, I purchased the 50 1.4 again. Same results. With both lenses set @ 1.8, the 50 Mark II delivers a better image (fine detail like the lashes of the eyes are crisp, colors seem to pop), the 50 1.4 is a bit softer (marginally so) and contrast is a bit flatter (again it's marginal). Has anyone else experienced this ? I really want to love the 1.4: Focusing is faster, the build is nice, and of course it's 1.4.
I also have noticed that the 50 1.4 produces brighter images than the 50 1.8. At the exact same aperture and shutter, the 50 1.4 image is about a 3rd stop brighter. Strange ?
Maybe I just need to give the lens more time, anyone else experience this ?