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  1. cookestudios

    5D4 Phantom Battery Drain

    Hey everyone, With my 1DX2 and 6D (and previous 5D3), I could leave batteries in the camera and pick it up days later without any substantial discharge. However, with the 5D4, after two days or so, my battery is often half-depleted. Has anyone else experienced this?
  2. cookestudios

    Sigma 120-300mm f/2.8 Sport vs. 400 f/2.8L IS Mark I

    Hey all, Long story short: I need a long, fast lens both for horse shows and classical music concerts (where it's dark, but I can't close to the stage). I'm between the Sigma 120-300 Sport and the first version of 400L IS. Has anyone used both or even just one and have an opinion? The weight of...