relaxo92127 years ago0+1-1My 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)ComplexUnit7 years ago+1+4-3 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