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Fotasy Nikon G AF-S Lens to Micro 4/3 Adapter, Aperture Ring, fits Olympus OM-D E-M1 I II E-M1X E-M5 I II III E-PM2 E-PM1 PEN-F/ Panasonic G7 G9 GH5 GM5 GX7 GX8
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lens - What is the little metal piece attached to the aperture ring in some Zeiss lenses? - Photography Stack Exchange
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