Hello! I am new to DSLRs and I just got a Sony a100k. I am getting it with a 18-70mm lens, but I am looking to purchase a telephoto. I am looking at these two below. I am leaning towards the first one because it's new and I found more reviews on it, but I would really appreciate some professional opinions from other people These are the two I am deciding between: Lens 1 315 × 315 - Sigma 70-300/4-5.6 Macro DG lense - Windsor Region Cameras For Sale - Kijiji Windsor Region Canada. or Lens 2 sigma minolta 75-300mm f 4.5-5.6 lens - Windsor Region Cameras For Sale - Kijiji Windsor Region Canada.