Thanks for the info last time guys. I picked up the 28-105 mk II and my first DSLR, a 20D from KEH.
Another question for my probable second lens. I am looking at the Sigma 15-30 f3.5-4.5. I was looking around at various places and have found widely varying prices. Adorama has it for about 500, but Amazon has it for 280. I suspect that the difference is in the details. Can someone translate the Sigma jargon on the ends of these lenses?
Sigma 15-30mm f3.5-4.5 EX DG DF at Adorama for $499
Sigma 15-30mm f3.5-4.5 EX DG IF at Amazon for $279
http://www.amazon.com/Sigma-15-30mm-3-5 ... 929&sr=8-1
Am I missing something, or is this just a crazy good deal? (I suspect the former.) Thanks a lot guys!