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:
Lens Mount On A Canon 40d Kowa 2x Anamorphic Adapted Lens Set Kowa 66 Lens Adapter Kowa Anamorphic Adapter Lens Set Kowa 6mm C-mount Lens Kowa Anamorphic Lens Mount Kowa C Mount Lens Kowa Camera Lens Mount Kowa F Mount Lens Kowa Six Lens Mount
Om-d E-m10 Mark Ii Lens Filter Canon R Adapter Control Ring Lens Adapter For Canon R6 Minolta Adapter For Sony A7 Steelsring Nikon F/gfx Adapter Types Require Lens Adapters Universal Lens Filter Adapter Braun Paxette Lens Mount M.zuiko 40-150mm F4.0-5.6 Lens Mount F-mount To Nikon 1