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
Sony Auto-lock Shoe Adapter Canon Breech Lock Adapter Idx Canon To V-lock Adapter Adapter Nikon G Lenses To Fujifilm X-mount Sony 2 Battery Adapter Sony F Battery Adapter Sony L Battery Adapter Sony V Battery Adapter Sony W To Z Battery Adapter Sony E Mount Lense Won't Lock
10 Mm E Mount Lens Sony A7r Iii Lens Mount Kamlan 50mm F1 1 Sony E Mount Canon Ae-1 Loose Lens Mount Cs To Canon Ef Mount 3d Print Canon T4i Lens Adapter E Mount Old Lens T Mount Lens 90 To 230 Vivitar Gfx Nikon Smart Adapter Sony Camera Adapter Ys-w270