Strange problem with XF 18-55 f2.8 - 4.0

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linus161 New Member • Posts: 10
Strange problem with XF 18-55 f2.8 - 4.0

Hello, i am experiencing a weird problem with xs-10 and xf 18-55 lens. At 18mm, I get the maximum sharpness at f4.0 (or f4.5), at f5.6 it is less sharp, it improves at f8.0, but still less sharp than at f4.0. from f10 onwards it becomes less and less sharp. At 55mm the maximum sharpness I get it at f8.0. Is it normal with this lens?

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