It is dustproof, splashproof, and freezeproof to match the "M.ZUIKO PRO" lens. Used Official OLYMPUS. Manufacturer: OLYMPUS. M.ZUIKO DIGITAL ED 40-150mm F2.8 PRO. M.ZUIKO DIGITAL ED 300mm F4 PRO. When attached to M.ZUIKO DIGITAL ED 40-150mm F2.8 PRO (focal length 150mm).
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