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<blockquote data-quote="BackdoorArts" data-source="post: 109740" data-attributes="member: 9240">First off, I've only dealt with Sigma support once and I have nothing but great things to say with how I was treated.As for the rest of it, the idea of sending my camera in with a lens so they can calibrate it seems extreme, particularly prior to my doing the type of assessment he suggested, and that you've mirrored.&nbsp; One would have to assume that his recommendations are based on what the majority of people would have around the house (a ruler and a floor), but either would work for assessment purposes.&nbsp; Do it, and see what you've got on your hands.&nbsp; Document your findings and send them off to Sigma prior to sending in the lens (with or without the body).&nbsp; Obviously, if it's just a fine focus calibration issue then you should be able to do that as a part of this, and if it's not you'll have the proof that they need to know that there's a lens issue, and you probably won't need to send the body.</blockquote>

[QUOTE="BackdoorArts, post: 109740, member: 9240"] First off, I've only dealt with Sigma support once and I have nothing but great things to say with how I was treated. As for the rest of it, the idea of sending my camera in with a lens so they can calibrate it seems extreme, particularly prior to my doing the type of assessment he suggested, and that you've mirrored. One would have to assume that his recommendations are based on what the majority of people would have around the house (a ruler and a floor), but either would work for assessment purposes. Do it, and see what you've got on your hands. Document your findings and send them off to Sigma prior to sending in the lens (with or without the body). Obviously, if it's just a fine focus calibration issue then you should be able to do that as a part of this, and if it's not you'll have the proof that they need to know that there's a lens issue, and you probably won't need to send the body. [/QUOTE]

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