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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Nikon F Mount 85mm 1.4 Sony Auto-lock Shoe Adapter Canon M100 Mount Adapter Moondgo Lens Case Adapter E Mount Lens 2016 Ltm L39 Lens Mount Nikon D3200 T Mount Sony Np-f750/f970 Battery Plate Adapter Sony Throttle Adapter A7iii Sony Lenses E Mount Offer Up