Hi, i have done 3 weddings, all as a friend to help out,i am not in any way a professional photographer,and neither did i charge,i told them i would do it and if they didn't turn out there can be no come back, they were happy to accept this condition,which put me at ease,i was lucky enough to be able to take the photo's outside the church which saved me a load of lighting problem's, all i used was a Canon 450d a 75/300mm lense and a sturdy tripod with remote shutter release, i took the photos, then downloaded onto there Pc's and it was up to them to do the rest, order extra prints ect,luckily all 3 weddings turned out really well,but be very carefull you explain the situation to all concerned,otherwise you could be in a right mess when it goes wrong