kfconcept
There are two types of FD mounts
FD/FL Breech-Mount (with a silver ring, you need to rotate the silver ring when attachment and removal), breech-lock mounts are identified by the silver ring
New-FD Bayonet Mount, bayonet mounts are identified by a red dot next to the lens release button
Here are the steps to install breech-mount version
Operating the adapter
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:
Bayonet Mount Lens Adapter Canon Sony A6500 Canon Mount Canon Bayonet Lens Adapter Om Bayonet Lens Adapter Screw To Bayonet Lens Adapter 1 3 Bayonet Mount Lens C Y Bayonet Lens Mount Zeiss Cp.3 35mm T2.1 E Mount Lens Zeiss Cp.3 Lens Inforamtion Ef Mount Sigma 30 F.1.4 Sony A Mount
Olympus Omd Mark Iii Lens Filter Canon 70-200 Ring Mount Samsung Nx1 Lens Mount Wide Angle Lenses For Nikon Z Mount Sigma 135 1.8 Sony E Mount Sony A77 E Mount Orion Xt8 Lens Adapter Fuji Xe3 Lens Mount L-mount Macro High Magnification Lens Using Nikon S-mount Lense