DO appears to still be alive More patents for large Canon DO lenses. The one of note is the 500 f/5.6, a lens that would be a very solid... show more
DO appears to still be alive More patents for large Canon DO lenses. The one of note is the 500 f/5.6, a lens that would be a very solid follow-up to the EF 400 f/4 DO IS. We’ve seen a lot of these patents in the past, and none of them have ever come to...read more... show less


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