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:
58mm Filter Thread Lens Hood Bower Fisheye Lens Adapter Fisheye Lens Vs Fisheye Adapter Opteka Fisheye Lens Adapter Fisheye Adapter Lens For Projector Fisheye Lens Adapter 49mm Fisheye Lens Adapter 52mm Fisheye Lens Adapter For Sony Fisheye Lens Or Adapter Universal Fisheye Lens Adapter
Nd Filter For Rokinon Xeen Lens C Mount Reduction Lens Nikon 24-70 Z Mount Adapter Canon Fd Auf Ef Rollei Qbm Objektiv Canon Eos Adapter 62mm Lens Adapter Tube Kodack Vest Pocket Camera Lens Adapter 39mm Screw Lens Mount Computar C-mount 55mm Telecentric Fixed Focus Lens Minolta X700 Lens Mount