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:
Nikon D40x Lens Mount Type Board Camera Lens Adapter Cambo Lens Board Adapter Fuji Gx680 Lens Adapter Board Linhof Lens Board Adapter Sinar To Linhof Lens Board Adapter Toyo Lens Board Adapter Graflex Speed Graphic 4x5 Lens Mount Graflex Xl Lens Mount S Mount Board Lens
Sony E Mount Lens Repair Manual Aperture Lens Canon Mount Rising Standard Pinhole For Canon Ef Mount Camera Lens Mount Compatibility Contax Aria Lens Mount Lens Mount Light Leak Nikon D300 F Mount Sony A7iii Adapters Output Sony Aux Adapter Cassette Sony E Mount Communication