CHRIS GAMPAT, PHOBLOGRAPHER:
"Zoom with your feet is a common thing that many photographers say. But that really just means that you get closer and not much more. The folks at Vsauce recently put together a video that partially shows off what the difference is between zooming in with a lens and simply moving closer. It has to do with the size of the subject, but there are many other differences that they don’t talk about."
Read more, here.