relaxo92127 years ago011My info is that the cropfactor is 1.6 on aps-c sensors, so the focal length is 112 to 320mm, right?Show in original language (German)michel.eichelberger7 years ago+143 Helpful answerFor EF lenses on a camera with an EF-S mount, the crop factor you mentioned applies. The conversion is also correct.Show in original language (German)Comment2 comments