A&P I know how to use the 50D to calibrate prime lenses but quick question about zooms

Discussion in 'Lifestyle' started by DaRkPhAnToM, Oct 4, 2009.

  1. DaRkPhAnToM

    DaRkPhAnToM FML OT Supporter

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    When calibrating a zoom lens at what focal length do i want to be calibrating it at? sorry if this is a retarded question
     

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