A patent for the Canon EF 600mm f/4 DO IS has finally appeared. A prototype of this lens was shown in September of 2015 at the Canon EXPO. We were also told a few months ago that the retail version of this lens could be coming near the end of 2017, though we haven’t received […]
from Nikon Digital SLR Camera With Lens
via Patent: Canon EF 600mm f/4 DO IS
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