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
A Mount Lens Adapter A-mount To E-mount Lens Adapter C Mount Lens Adapter D Mount Lens Adapter E Mount Lens Adapter F Mount Lens Adapter L Mount Lens Adapter X Mount Lens Adapter F-c Mount Lens Adapter Quantum Q Flash Nikon Adapter
E Mount Telephoto Lens Olympus Om D Lens Adapter Tilt-shift Lens Ef Mount Firin 100mm F/2.8 For Sony E-mount Canon 70-200 E Mount Canon Xl1 Xlr Adapter Phase One Hasselblad Lens Adapter Zeiss Cine Lens Ef Mount Eos Pentax K Adapter Adapter For Sony Mx 510