Before you tell me to Google, I thought maybe I could ask the all-knowing photographers here at MR to help me. I have learned about photography basically from scratch, and after reading heaps, the one thing that I still don't understand (at all)*cough* are lenses, and what I need. Here's one of many (many many) questions I have about lenses: Why would you want to get a 28-70 mm lense at all when you can just get a single 28-200mm lense? One goes to 70 mm, while the other goes to 200mm. I realize that the price, glass, etc, is different, but why not just get one with the largest range of numbers possible? Is that silly? Anyway, since I blew my chance and didn't get that 2 lens + Nikon D50 combo at the airport (still a great great deal though, but I'm not departing internationally for a while ), I thought about it and may actually just get the D50 body and buy my lenses separately. The question is which one, and for my understanding, why? I also don't understand the "lingo" is when it comes to lenses. Looking at Nikon lenses, what does AF and AF-S mean? How about DX? I figured out what IF and ED is though (yay!). What about the "G" in front of f/3.5-5.6G? Sometimes it says "D" instead of "G". And why do some lenses not give you a range of apertures at all? Why would someone want only f/2.8 and not more options? In fact, lenses that say f/2.8 never give you a range. I find it strange to not give you any choice. In fact, I don't understand why it would be so hard for them to just give you a much larger range of aperture sizes. Is it a physical limitation? I have more, but can't think right now.