dcheung Posted April 24, 2009 Share Posted April 24, 2009 <p>My 50/1.4 focuses perfectly spot on at near field (say about 3m). I can use f/1.4 and get very sharp images at center frame at this distance. However, in far field (say >10m), the lens tends to back focus.<br>Will calibration help? I thought the way calibration would work was that it would shift the focus at all distances. If the far field was fixed to focus perfectly, then the near field would end up front focusing. Is this correct?</p> Link to comment Share on other sites More sharing options...
ronhartman Posted April 25, 2009 Share Posted April 25, 2009 <p>Check out this thread below. There is mention of the AF calibrated at more then one distance.</p> <p>http://www.photo.net/canon-eos-digital-camera-forum/00T9kY</p> Link to comment Share on other sites More sharing options...
mike_oflaherty Posted April 30, 2009 Share Posted April 30, 2009 <p>Are you familuar with depth of feild. If you are shooting wide open @1.4 you df is going to be shallow before and after the subject. Close it down to f8 or smaller to bring more into focus.</p> Link to comment Share on other sites More sharing options...
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