100-400mm FE GM -- what makes it G-Master?

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jackgreen
jackgreen Contributing Member • Posts: 805
100-400mm FE GM -- what makes it G-Master?

Pardon my question, but I really think that all lenses going below F4 should not labelled as G-Master?

Yes I know, it contains one Super ED element and two ED elements, in total 22 elements in 16 groups, nano AR coating, plus the front element has a fluorine coating, It's pretty sharp -- no doubt, but still F4.5-5.6?

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 jackgreen's gear list:jackgreen's gear list
Sony a9 Sony FE 55mm F1.8 Sony FE 24-70mm F4 OSS Sony Vario-Tessar T* FE 16-35mm F4 ZA OSS Sony FE 70-200mm F2.8 GM OSS
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