It is Canon EF / EF-S (EOS) mount lens to Nikon 1 mount (J1 / V1) adapter. For Canon EF / EF-S lenses, only the maximum aperture can be used. Canon EOS to Nikon 1 adapter x 1. Although the lens will fit physically, automatic diaphragm, auto-focusing or any other function will not operate correctly while using this adapter.
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