Sigma set to announce a new super-telephoto zoom lens for full-frame mirrorless cameras, the Sigma 100-400mm f/5-6.3 DG DN OS. Check out the leaked specifications and price of the upcoming Sigma 100-400mm f/5-6.3 DG DN OS Lens (for L-mount and E-mount), TC-2011 teleconverter & TC-1411 teleconverter for L-mount and Sigma USB dock UD-11 for L-mount.
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https://www.dailycameranews.com/2020/06/sigma-100-400mm-f-5-6-3-dg-dn-os-lens-specifications-price/