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:
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Cheap Anamorphic Lens Ef Mount Lumix Gh4 Lens Mount Sigma 16mm E Mount Lens Samsung Nx3000 Lens Adapter Sony Alpha A6000 Leica M Adapter Olympus Om 2 Lens Mount Lee Filter Adapter For Nikon 14-24 Nikon Af T Adapter Ring Female Nikon Bayonet F Mount Adapter For Sony A6000 To Ipad