1st off I know very little about cameras and I've got a lot of questions. Today I found out my work will cover $1500.00 for an intraoral camera (USN Dentist) so I can document my patient's cases. This will be my first real camera, but I have NO idea where to start. I can spend over $1500, but the remainder comes out of my pocket so I want to keep it below 2k, and I must have the following: Camera, micro/macro lens, memory card and ring light. I'd love to get an additional lens to use for other things, but I don't know where to start or if that is in my current budget. I've been looking at the Nikon D90 and it seems like that's a good fit for me, I know it's not made for video but I like that feature. What other cameras should I consider? Next I'm not sure about the lens, card, or ring light and that is where I need your help. For the micro lens some get longer and some don't change when focusing correct? I think I'd like one that stays the same length as I'll be working in very close proximity to someones oral cavity... And where can I go read about what the different mm lenses mean? I'm a complete camera noob so make it simple:er: Thanks!