as im new im going to be asking alot of questions lol, is there a section to help me understand the difference in the lenses like 18-70 and 70-300, and what they are used for and when. as i havent got a clue. or can someone enlighten me please cheers. im waiting for my sony A300 to arrive through the post and im eager to get out there and start snapping 
On a clear day . . . I can see forever . . . with any lens. LOL