Do you own a smc DA * 55mm f/ 1.4 and have any AF issues?
I also have this lens and mine also needs a +5 adjustment but on my K-5. My only complaint about this lens is that it 'chatters' back and forth a bit looking for focus and I, quite often, get shots that are not focused correctly. I'm not sure if it needs a firmware upgrade but otherwise it is a very sharp lens.
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