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
Nikon F Mount Cameras Nikon Cameras With F Mount Pentax Me Lens Mount Nikon F Bayonet Mount Lenses Female Nikon Bayonet F Mount Nikon Bayonet Mount Lenses Nikon F Bayonet Mount Vs F Mount Sony E Mount 35mm F.14 Sony E Mount F.95 Sony E Mount F.98
Dslr Lens Filter For Eclipse Lens Filter Adapter Ring Sigma Art Canon Mount Pi Camera Lens Adapter Leica Sl Mount For Red Robot Royal Lens Adapter Convert M42 Lens To K Mount Pentax Q Battery Adapter Sony Bdp Bx37 Wireless Adapter Sony Cassette Adapter Model Cpa-9c