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Ron Martinsen's Photography Blog: REVIEW: Canon EF 100-400mm f/4.5-5.6L IS II USM Lens (SIGMA 120-300 & Canon 200-400 Compared)
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The Canon EF mount is alive - the EF 100-400 f/4.5-5.6L IS II USM on the EOS R5 - Photographs from Dr. Gerd-Uwe Neukamp
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