On 2/17/2017 11:51 AM, Collin Brendemuehl wrote:
Should one *not* purchase the 55/1.4 SDM b/c of the focus system probems? Or is the failure rate, while noticeable, still modest?
I had no problems with the SDM, FWIW. I don't think it was one of the problem child lenses. The thing is wisked sharp, but I though the bokeh was a touch nervous for what was being flogged as a portrait lens. I sold my version, and am now wishing I hadn't. Apparently it can be made to work just fine on the full frame.
The FA50/1.4 is a better portrait lens, it gives a smoother rendition of skin tones, but is not as sharp overall. The 55/1.4 is sharp from wide open to about f/16, after which you might notice a bit of diffraction.
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