Despite what you might read elsewhere, the Canon EOS R series cameras are not the first mirrorless interchangeable-lens cameras Canon has offered. That distinction belongs to the company’s Canon EOS M product line, a series of consumer-oriented cameras which continues to be offered, but was never meant to be a tool for advanced or professional photographers. Your Canon EOS R was carefully designed to fully meet the needs of a much different group: dedicated photo enthusiasts, semi-professionals, and professional photographers.

With the EOS R, you’re not giving up much, other than a mirror and a pentaprism/pentamirror optical viewfinder, 12 ounces of weight, and quite a bit of bulk—compared to the Canon 5D Mark IV which is Canon’s ...

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