So on a bit of a whim I picked up a 4x5 camera on the bay 2 days ago (should be here soon). I have been reading up on them and preparing everything I need for it. The camera is complete with case and plenty of film backs (Im sure I will have questions on loading when it gets here) and a curtain. My question is, do I need a focusing loupe? Can I use a regular jewelers loupe? Are they helpful or are they just another item to cary around? Can any one suggest a good one (in-expensive but solid)?