Fotodiox Pro Lens Mount Double Adapter - Rollei 6000 (Rolleiflex) Series and Canon EOS (EF / EF-S) D/SLR Lenses to Micro Four Thirds (MFT, M4/3) Mount Mirrorless Camera Body with Built-in De-Clicked Aperture Iris Lens Mount_Olympus Pen-F Lens Mount: Exakta

Lens Mount: Exakta

it is NOT suitable for Pentax Takumar lens (Fotodiox V

You can easily find B4 lenses on KEH

Fotodiox adapters are meant to be taken off and put back on your camera as much as needed while remaining as precise as the day you bought them

Lens Mount Exakta

Fotodiox Pro Lens Mount Double Adapter - Rollei 6000 (Rolleiflex) Series and Canon EOS (EF / EF-S) D/SLR Lenses to Micro Four Thirds (MFT, M4/3) Mount Mirrorless Camera Body with Built-in De-Clicked Aperture Iris Lens Mount_Olympus Pen-F Lens Mount: ExaktaFeatures: Double adapter mounts Rollei 6000 (Rolleiflex) Series & Canon EOS (EF EF S) D SLR Lenses to Micro Four Thirds (MFT) mount mirrorless cameras; infinity focus or beyond allowed Integrated adjustable iris to allow some control over depth of field (** Will also produce sever vignetting ** ) Integrated de clicked aperture iris for incoming light adjustment Enhanced craftsmanship and high tolerance construction for demanding professionals Precise