RF 70-200mm F2.8L IS compared to the EF 70-200mm
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RF 70-200mm F2.8L IS compared to the EF 70-200mm

Oh, and the other interesting thing about the RF 70-200mm F2.8L IS? It's TINY. Here we've shot it alongside the most recent EF 70-200mm F2.8L IS and you can see just how much smaller it's going to be. Unless the 'pro' RF model ends up being huge, this is going to make an impressively compact combination.

Canon's engineers wouldn't be drawn on exactly how they've managed to make it so small, beyond pointing us back to the claimed benefits of the short and wide lens mount. There may well be something more complex going on: we'll find out when it's formally released but we were given the distinct impression that it's not a diffractive optics (Fresnel) design.