Imaging recource: Lightest in its class: Tamron announces new 100-400mm f/4.5-6.3 Di VC USD full-frame telephoto zoom

Earlier this year, Sigma and Sony each announced a 100-400mm lens, with the latter a high-end lens as part of Sony's G Master lineup. Now Tamron is getting in on the 100-400mm race with its new 100-400mm f/4.5-6.3 Di VC USD (Model A035) lens, which is actually a bit faster than the newest Sigma at the wider end of the focal length range. While we don't have pricing information for the new Tamron 100-400mm lens, we do know that it'll release by the end of the year, if all goes as planned, and we have a variety of specifications...
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