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
Sigma 70-210mm F.2.8 Apo Canon Ef Mount Fujifilm Lens Ring Mount C Mount Lens Spacer E Mount Lens Spacer Spacer For C Mount Lens Adapter Nikon Dx To Gh5 Sigma 30 F.1.4 Sony A Mount Sony E Mount 35mm F.14 Sony E Mount F.95 Sony E Mount F.98
Instax Mini Color Filter Lens 6 Lens Ibm Camera Filter Olympus Om-d E-m10 Mark Ii Lens Filter Canon Mf4350d Wireless Adapter Cs To M12 Lens Adapter Olympus E Volt E-300 Lens Mount Adapter Om Nikon F Nikon Mirrorless Mount Diameter Vintage Zeiss Nikon Mount Pentax 67 Gfx Adapter