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These days, camera lenses aren’t just simple bits of glass in sliding metal or plastic housings. They’ve often got a whole bunch of electronics built in as well. [Dan K] had just such a lens from ...

The Canon EF 100-400mm f/4.5-5.6L IS II USM is a new professional telephoto zoom lens for full-frame DSLR cameras. Is this the perfect do-it-all super-telephoto zoom lens for wildlife and sports ...

The Canon EF 100-400mm f/4.5-5.6L IS II USM is a new professional telephoto zoom lens for full-frame DSLR cameras. Is this the perfect do-it-all super-telephoto zoom lens for wildlife and sports ...