Some have discouraged comparing the Tamron 28-75mm f/2.8 Di III RXD FE and Sony FE 24-70mm f/2.8 GM, but almost everyone that has the lens in hand says that it is sharper than the G Master. Hopefully, more of these lenses become available soon because I know a lot of photographers are waiting to get their hands on one. It has also been reported that some of the lenses that have experienced the most extreme focusing issue on Youtube might have had a mechanical defect since so many haven’t experienced the problem or rarely have issues with the lens.
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Tamron 28-75mm f/2.8 Di III RXD FE: B&H Photo / Amazon / Adorama
Sony FE 24-70mm f/2.8 GM: B&H Photo / Amazon / Adorama
Sony 24-70mm f/4 Vario-Tessar T FE OSS: Amazon/B&H Photo/Adorama
Sony FE 24-105mm f/4 G OSS: B&H Photo, Amazon, Adorama
https://www.youtube.com/watch?v=By4pId0onQw