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<blockquote data-quote="gunfighter48" data-source="post: 635689" data-attributes="member: 43863"><p>You will need to setup a test target, then put the lens on your camera. Then focus the lens at the target at 3 different distances. You will need to see if the lens is on focus or it it needs to be adjusted for front or back focus. You'll need to do that for each focal length. I have a Tamron 70-200mm lens so I'll probably pick 3 or 4 focal lengths to test/adjust and call it good at that point. It will be time consuming.</p></blockquote><p></p>
[QUOTE="gunfighter48, post: 635689, member: 43863"] You will need to setup a test target, then put the lens on your camera. Then focus the lens at the target at 3 different distances. You will need to see if the lens is on focus or it it needs to be adjusted for front or back focus. You'll need to do that for each focal length. I have a Tamron 70-200mm lens so I'll probably pick 3 or 4 focal lengths to test/adjust and call it good at that point. It will be time consuming. [/QUOTE]
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