sigma 150-600c

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    Sigma or Nikon telephoto lens for Nikon D7500

    Hi, I am thinking of getting a lens to shoot wildlife on my Nikon D7500. So far, I have shortlisted these lens (within my budget): 1. Sigma 150-600mm contemporary 2. Nikon 200-500mm Which will you recommend? I read that there are autofocus issues for the Sigma 150-600mm lens, has anyone tried...