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| Canon 70-200mm F2.8 DOEの特許: キヤノンが8K時代を見据えた70-200mm F2.8 DOE(回折光学素子)の特許を出願中です。 2020年の東京オリンピックでは70-200mm… https://t.co/CY1Ew0975A | |
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