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
35mm E Mount Lens 35mm C Mount Lens 35mm Z Mount Lens C Fd Lens Mount 35mm Canon Fd Mount Canon 35mm Fd Mount Camera Lens Canon Fd 35mm F2 8 Fd Mount Canon Fd Fl Mount 35mm F2.5 Canon Fd 35mm 1 2 Adapter Ef Mount Cinema Prime Lens
Filter Holder For Samyang 14mm Lens Wide Angle Lens Cpl Filter Tamron 150-500mm Sony E Mount Canon 5d Lens Adapter Leica Macro Adapter 14652 Fisheye Lens Adapter For Powershot Elph 160 400mm K Mount Lens Nikon F Mount Aperture Lever Tamron 35mm Nikon Mount Sony A200 Lense Mount