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:
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Canon Ef-s Lens Mount Canon 5d Lens Adapter Canon R Mount Aps C Canon Mft Adapter Autofokus Ed Houston Lens Adapters Kipon Baveyes 0.7x Lens Mount Adapter Sigma Lens To Olympus Adapter M37 To M43 Lens Mount Adaptador Lente Nikon A Panasonic 4 3 Nikon F-mount Camera Adapter