There is no ROM connection on the ring so diaphragm control of the lens is set manually
It is possible to use Macro rings and other accessories
Brand new, never used
Material: copper and aluminum
Color: Silver and Black
All Leica R Mount Lenses
All Canon EOS DSLR or Film SLR Camera.
(such as:850D/1DX III/250D/90D/4000D/2000D/6D II/200D/77D/5D IV/1300D/80D/1DX II/5DS/5DS R/760D/750D/7D II/1D/6D/7D/5DIII/5DII/100D/700D/650D/600D/550D/1100D/1000D/500D/70D/60D/50D/40D..etc)
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