LensRentals looks inside the Canon 16-35 f/4 IS
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LensRentals looks inside the Canon 16-35 f/4 IS

According to Roger, 'the rear bayonet came off only with a bit of a tug, because it has a really thick, soft rubber water weal between it and the rear barrel [...] With those parts off, the printed circuit board is exposed and ready to have its flexes disconnected. I always like the nice, clean way Canon’s engineers set up the circuitry on their PCBs.'