title: Image processing - convert 33/35mm picture to 100+ mm
body: <p>iPhone's focal length ranges from 30-35 mm depending on the model. My question is, is it possible by image processing, using same focal length to capture a photo which is as if taken with 100mm or 125 mm?</p>
  
  <p>I have searched all over and could not any answer. Also, if this is not possible please describe the technicalities of lens and software why this could not be done.</p>