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  1. O

    Used Canon EF 300mm f4 L IS USM Lens

    A major reason that I am seriously considering a fixed aperture is that I bird mostly where dust and very fine particulates are a real problem and hence I consistently have a real problem with the zoom lenses sucking in dust. Once it is on the inside of the lenses it cannot be cleaned away.
  2. O

    Used Canon EF 300mm f4 L IS USM Lens

    Thanks for sharing your experience with this combination. I had been debating whether to "upgrade" to one of the new Canon mirrorless bodies from the 7D mkii I am now using, but had seriously been considering trying the 300mm f/4 L IS instead. The biggest factor for me is the weight issue as I...