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 F Mount Lens Adapter L Mount Lens Adapter T Mount Lens Adapter X Mount Lens Adapter M42 To Nikon Mount F-c Mount Lens Adapter
Soft Focus Lens Vs Filter Solar Eclipse Lens Filter 67mm Zeiss 16-35mm Sony E Mount A7rii Canon Lens Adapter Leica M Sony A Adapter Nex 6 Lens Adapters Nikon Fsa L1 Adapter T Adapter Nikon D3400 Nikon S Mount 85mm E-mount Lenses For Sony