I have just started out and looking for some help purchasing a really good digital camera for taking wedding photo's. I had questions regarding lens and flashes. I have a old canon (not sure the model) but it is a film. I was wondering if the lens from that camera would work on a newer canon model? Not to mention, I am now the photographer for my sisters wedding and I have to do a good job, so if anyone has any tips on wedding photography, if would be greatly appreciated!!