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<blockquote data-quote="BackdoorArts" data-source="post: 355615" data-attributes="member: 9240">I've heard the issues and it's not just a problem with Nikon as my brother had fits with the focus calibration of his 120-300mm Sports and Canon 1D Mk III.&nbsp; Sigma eventually fixed that one in the firmware thanks in large part to <a href="http://sigma120to300sportssaga.blogspot.com/" target="_blank">his persistence with their tech support</a>.&nbsp; This other glass may be more difficult to correct since they are not USB Dock enabled.&nbsp; Regardless, I have less of an issue with Nikon not testing their new bodies with all possible 3rd party lenses than I do with any deliberate sabotage built into the firmware of new bodies to cause issues with non-native glass.&nbsp; I don't know which is the case here, but I suspect that since the issues seem to be limited to consumer grade lenses I suspect that there's some hanky panky going on.With all that said, I'm a big Sigma fan and have had zero issues on any of my bodies (D7000, D7100, D600, D610, D800) with their 8-16mm, 24-70mm f2.8, 15mm Fisheye, 105mm f2.8 macro or 150-500mm zoom (OS only on the last 2).</blockquote>

[QUOTE="BackdoorArts, post: 355615, member: 9240"] I've heard the issues and it's not just a problem with Nikon as my brother had fits with the focus calibration of his 120-300mm Sports and Canon 1D Mk III. Sigma eventually fixed that one in the firmware thanks in large part to [URL="http://sigma120to300sportssaga.blogspot.com/"]his persistence with their tech support[/URL]. This other glass may be more difficult to correct since they are not USB Dock enabled. Regardless, I have less of an issue with Nikon not testing their new bodies with all possible 3rd party lenses than I do with any deliberate sabotage built into the firmware of new bodies to cause issues with non-native glass. I don't know which is the case here, but I suspect that since the issues seem to be limited to consumer grade lenses I suspect that there's some hanky panky going on. With all that said, I'm a big Sigma fan and have had zero issues on any of my bodies (D7000, D7100, D600, D610, D800) with their 8-16mm, 24-70mm f2.8, 15mm Fisheye, 105mm f2.8 macro or 150-500mm zoom (OS only on the last 2). [/QUOTE]

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