When I compare my camera which is dx (crop body) and to a friend's canon 5d mk2 it seems to give a lot more blur to the image. Why?
marked as duplicate by Matt Grum, Nick Miners, mattdm, dpollitt, Itai Aug 4 '12 at 2:50
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
Short answer (because I'm sure this has been answered but I can't find a really good example):
With FF to fill the frame with your subject you have to either