canon 16-35 2.8 is or canon 16-35 f4

  1. Nigel Jennings

    Beginner Canon 16-35

    hi all I am upgrading my wide angle lens, I am looking at the Canon 16-35, my question is do I go for the f4 or the f2.8 iii I want it for Landscape mainly, but want to try some astrophotography
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