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:
Spotting Scope Sun Lens Filter Canon Efs Lens Adapter Efs To Mft Adapter Canon 5d Lens Adapter Ef Efs Lens Adapter Efs Lens Mount Adapter Efs Lens Mount Adapter Sigma Efs Lens To Efs Adapter Fotodiox Efs Lens Adapter Nikon F Adapter Efs
Nikon D3000 Lens Mount Nikon Ur E8 Lens Adapter E Mount Af Lens Sony 55-200mm E Mount Canon 16-35mm F4 E Mount Sony V Mount Adapter Canon Lp-e8 Fx Lens On Dx Camera Adapter Hasselblad Lens Eos Adapter Nikon M42 Adapter Test Sony A7s Ii Fe Mount