LensRentals Canon EF 70-200mm F2.8 Mark III and Mark II teardown
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LensRentals Canon EF 70-200mm F2.8 Mark III and Mark II teardown

When Canon announced the EF 70-200mm F2.8L IS III USM earlier this summer, the company was pretty open about the fact that it was a minor upgrade to its predecessor, featuring tweaked coatings and a new finish, but the same optical-mechanical formula.

Never ones to take a press release at face value (and since repairing lenses is a big part of their job) Roger Cicala and the team at LensRentals opened the lenses up to see whether Canon made any hidden changes. Not to spoil the surprise, but what they found... wasn't a surprise.

All images courtesy of LensRentals, and used with permission.