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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 M Mount Cameras Canon Ef Nikon F Adapter Leica Digital Adapter 2 Sony Fs700 E Mount Canon G1x 58mm Adapter Techart Autofocus Lens Adapter New E Mount Lens 70-350 Nikon D3300 Wireless Adapter Ebay Nikon D7100 Wireless Adapter Price Nikon P900 Wide Angle Adapter