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 E Mount Fixed Lens Canon Ef Eos Mount Canon Fd Mount Fixed Aperture 24-70mm Ef Mount Lens Fixed Aperture A-mount Wide Fixed Lens C Mount Fixed Focus Lens Constant Aperture Zoom Lens Sony A Mount E-mount 200mm Fixed Lens F Mount Fixed Lens Fixed Focus C-mount Lens
Pentax 645 A Mount Canon G5x Lens Adapter Sony E Mount Gm Lenses Tamron 70-300mm Sony A Mount Canon 70d Xlr Adapter Sametop's Canon Fd Adapter Sony Alpha A6300 Nikon Adapter Adapter Samsung Nx Sony Nex Sony Wh-1000xm3 Doesnt Come With Adapter Sony A7iii Work With A Mount Lenses