Imaging recource: Lensrentals cracks open the new Canon RF 600mm f/11 supertelephoto lens to see what’s inside

Announced alongside the high-end EOS R5 and R6 full-frame cameras, Canon introduced a pair of rather strange supertelephoto lenses, the RF 600mm f/11 IS STM and RF 800mm f/11 IS STM. Yes, that is correct, f/11. And *just* f/11. Unlike most other lenses, this pair of super-long primes have a fixed-aperture design at f/11. And unlike Canon's "normal" 600mm and 800mm supertelephoto lenses, the newest versions of which cost an astronomical $13,000 and weigh in at around seven pounds and 10 pounds, respectively, these new RF-mount,...
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