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I just scored a good deal on an SMC Pentax-M 28/2.8 and a Takumar 135/2.5 for my K-30. Along with the SMC Pentax-M 50/1.7 and Vivitar M42 200/3.5 that I already have, that will give me a full kit of decent manual lenses for my bag. I have another bag with my Nex-5R and various FL manual lenses, so I can grab one or the other camera based on my need (or whim) for a day of shooting.
I've had my K-30 less than two weeks, and I like it a lot, but I'm still struggling sometimes with focusing. Sometimes when I'm looking through the view finder, the scene looks clear and sharp, but then I find it is slightly OOF when I look at it on a big screen. I try to bracket shots, taking several photos with slight changes of the focus ring, to give me the best chance of a sharp photo, unless I'm able to zone focus. That is one area where the Sony Nex is, IMO, superior: its implementation of focus peaking.
Anyone else that uses legacy lenses on a Pentax DSLR have any hints to help increase my percentage of keepers with the K-30?
Tony