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Forum: Pentax K-1 & K-1 II
04-27-2016, 07:37 PM
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First and foremost, Pentax is under absolutely no obligation to ensure any of their bodies work with third party lenses. I'm sorry your lens doesn't work on the K-1 but it is not Pentax's fault. Maybe a lens service/firmware update will help, maybe not.
Secondly, I had the Sigma EX DG 70-200/2.8 II HSM Marco for several years, and I found the AF to be very skittish on the K-3, and completely non-functional on the HD DA 1.4x TC. It was much better on my older bodies (K10D, K-5 and K-5 IIs).
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