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Who uses AF fine tune? calibrating lenses
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<blockquote data-quote="BackdoorArts" data-source="post: 242031" data-attributes="member: 9240"><p>That's the burning question. I believe that, given the single adjustment point, it will be applied across the lens. I check at the far end because, as I stated, it will produce the narrowest depth of field wide open. I check zooms at the short end, midpoint & long end, and if it's largely consistent in terms of front/back focus then I will adjust at the long end and recheck, knowing that if I'm always front or back then I should be OK. If, however, I'm front on the short end and back on the long (or vice versa) I will play with the long end getting it as close as possible without adversely effecting the other points. For me it's more a concern on my longer zooms (70-200mm and 150-500mm). The 24-85mm and 24-120mm give me enough DoF at f/3.5 and f/4 respectively that it's almost not a concern when I calibrate the long end. If there's a huge back to front swing, I swag it at about 2/3 and hope for the best.</p></blockquote><p></p>
[QUOTE="BackdoorArts, post: 242031, member: 9240"] That's the burning question. I believe that, given the single adjustment point, it will be applied across the lens. I check at the far end because, as I stated, it will produce the narrowest depth of field wide open. I check zooms at the short end, midpoint & long end, and if it's largely consistent in terms of front/back focus then I will adjust at the long end and recheck, knowing that if I'm always front or back then I should be OK. If, however, I'm front on the short end and back on the long (or vice versa) I will play with the long end getting it as close as possible without adversely effecting the other points. For me it's more a concern on my longer zooms (70-200mm and 150-500mm). The 24-85mm and 24-120mm give me enough DoF at f/3.5 and f/4 respectively that it's almost not a concern when I calibrate the long end. If there's a huge back to front swing, I swag it at about 2/3 and hope for the best. [/QUOTE]
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Who uses AF fine tune? calibrating lenses
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