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 70 200 Z Mount Lens Rolleiflex To Leica Lens Adapter Rolleiflex To Leica Lens Adapter For M3 Rollei Sl66 Lens Adapter Rollei Sl66 Lens Mount Rolleiflex Sl20000 Lens Mount Rolleiflex Sl35 E Lens Mount Rolleiflex Sl35 Lens Mount Rolleiflex Sl66 Lens Mount Sl66 Lens Mount Photo
Small Round Auto Darkening Lens Filter Cine Zoom Lens Ef Mount Sony M2 Micro Sd Adapter Adapter Samsung Nx Canon Mamiya 645 Af Lens Adapter 70 200 2.8 Lens K Mount B4 Lens To Pl Mount Rokinon 12mm E Mount Lens Nikon F Adapter Sony Nex Sony Vesa Adapter V001