Tamron recently has teased four new FE lenses that will be announced soon. According to recent reports one of the telephoto zoom FE lens will be Tamron 70-180mm f/2.8 Di III RXD lens designed for Sony E-mount.
This Tamron 70-180mm f/2.8 Di III RXD lens will be a very compact lightweight lens compared to Sony FE 70-200mm f/2.8 GM OSS Lens.
The official announcement is expected in October, 2019.
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