Sony announced the FE 400 mm F2.8 GM OSS lens (SEL400F28GM) for E-mount cameras. The lens has a diameter of 158 mm, a length of 359 mm and weighs 2,897 grams. There is a total of 23 elements divided into 17 groups. Going more specifically, we find 3 fluorite elements and the Nano AR anti-reflection treatment, useful for eliminating unwanted …
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