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:
Reverse Lens Adapter Canon Novoflex Reverse Lens Adapter Reverse Lens Adapter Nikon Lens Reverse Adapter Ring Pentax Reverse Lens Adapter 52mm Macro Reverse Adapter Ring For Nikon Nikon To Pentax Q Adapter Reverse Lens Adapter 52mm Canon Eos Reverse Lens Adapter Nikon 52mm Reverse Macro Adapter
Best Filter For Nikon 18 55mm Lens Nikon Ftz Lens Mount Adapter Fuji Xt2 Lens Mount 50mm Lens To 52mm Adapter Cheap Anamorphic Lens Pl Mount Mamiya Press Lens Mount Toyo Lens K Mount Sigma Minolta Mount 400mm Nikon To Ef Mount Sony's E-mount 16mm F 2.8