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  1. Ragna

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

    Redshift the Tamron 1.5x is one of the only converters to auto focus on a non 1D series camera on a 5.6 lens
  2. Ragna

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

    Dicker i still think the Canon 100-400 5.6L +1.4x will be a better option than the bigma on a full frame camera.No neither will autofocus with the converter. The Canon is the best converter but Kenko make a Teleplus 300 PRO 1.4x which is reported to be good as the Canon but a Far better...
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