kfconcept
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:
Leica M Mount Lenses 1 3 To 2 3 Lens Adapter 4 3 Lens Adapter Canon To Canon Lens Adapter 2 3 Lens Adapter 1 2 Lens Adapter Asi1600mm Adapter To Lens C Y Lens Adapter Lens Adapter 4 U Newport Camera Lens Mount
Sigma 105mm Macro Lens Diameter Filter Metabones Ef To Mft Adapter T Mount Adapter For 500mm Lens Sony E Mount 10 A Mount For Canon Difference Between Canon Nikon Mounts Tamron 70-300mm F 4-5.6 Vc Canon Mount Eos R Lens Adapter 16 Lens E Mount For Sony A6500 Nikon G To Threaded Adapter M54