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  1. S

    Canon 5D- 100-400 is Lens or Sigma 50-500 Lens?

    There is zoom sharp and prime sharp. I haven't seen a zoom yet that will beat out a high quality prime, wide open and at either of it's focal length extremes. I have also never seen a zoom lens that doesn't get sharper when stopped down. The Canon 70-200 F2.8 is one sharp puppy wide open. But...
  2. S

    Canon 5D- 100-400 is Lens or Sigma 50-500 Lens?

    Dicker, Please read my latest response in your other thread. If these are the only 2 choices, I'd suggest the 100-400 ISL. I loved my Bigma, but the AF wasn't very fast, it didn't have IS, was heavy, was softer from 400mms on out and the "extra" 100mms is closer to an extra 65mms (465mm at...
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