Super slim M42 screw mount lens to Canon EOS R RF mount adapter - for macro helicoid extension ring - EOS R R3 R5 R6
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1mm thickness, designed for M42 extension rings and helicoid rings (sold separately). Also used for modification of camera mounts.For using Canon EOS R RF mount mirrorless digital cameras with M42 (42mm x 1.0) screw mount helicoid rings.Switching on "Release shutter without lens" in custom menu C.Fn5, then switching shooting mode...
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