A few years ago, if you wanted good image quality from a supertelephoto zoom lens, your only real choice was a first-party option. In the past few years, however, we have seen a real surge in high-quality third-party options that offer a lot of versatility and image quality at prices that often significantly undercut first-party lenses. This great video review takes a look at three of those, the Tamron 50-400mm f/4.5-6.3 Di III VC VXD Tamron 150-500mm f/5-6.7 Di III VXD, and Sigma 100-400mm f/5-6.3 DG DN OS Contemporary.
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