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Canon have released a new firmware update for the Canon EOS 5D Mark II DSLR camera. Version 1.0.7 improves and mitigates the following two types of image quality phenomena that occur under certain shooting conditions.

  1. “Black dot” phenomenon (the right side of point light sources becomes black)
    When shooting night scenes, the right side of point light sources (such as lights from building windows) may become black. The phenomenon may become visible if the images are enlarged to 100% or greater on a monitor or if extremely large prints of the images are made. This firmware improves and mitigates this phenomenon.
  2. Vertical banding noise
    If the recording format is set to sRAW1, vertical banding noise may become visible depending on the camera settings, subject, and background. The firmware improves and mitigates this phenomenon.

Website: Canon EOS 5D MarkII Firmware Update