I have a EOS 7D awell as a EOS 5D mark iii, right now im using the 5d while I learn and improve since I'm pretty new. But then it got me wondering, whats the use of having two cameras? I tried googling the differences but It's very confusing to me, is one better than the other? Should I even use both? Do I shelf the 7D and just use the 5D? If anyone could clear this up and help me out it would be greatly appreciated!