kfconcept
Please note: our M42 adapter ring could not be suitable for Pentax Takumar Super Takumar Carl Zeiss M42 series(aperture pin does not fully depress, small tabs sticking out), as ours depresses the aperture pin all the way down
If your camera indicated "lens is not properly installed", please modify the camera menu settings. Usually called the "release the shutter the lens is not installed", you can modify the settings to allow. Specifically refer to the camera manual.Following are some examples:
Lens Filter For Mamiya Rb67 90mm Sony Memory Stick Adapter Mamiya Rb67 Lens Adapter Mamiya Rb67 Lens Mount Mamiya Rb67 To Nikon Adapter Mamiya Rb67 Lens Mount Adapter Ring Adapt Rb67 Lens To Canon Lens Adapter For Rb67 Mamiya Rb67 Lens Adapter For Nikon Dslr Pentax 645z Lens Adapter Rb67
Fujifilm Ar-x100 Adapter Ring Meike Cine Lens E Mount Canon 17 120 Change Mount Canon Lens Mounts Fd Ef Metal Lens Mount Vs Plastic Rokinon Cine Lens Mount Swap Wemberly Camera Lens Mount Nikon P Series 30mm Mount Ricoh Lense To Sony E-mount Sony A7 Nex Mount