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
D Mount Lens Adapter E Mount Lens Adapter T Mount Lens Adapter Nikon Ftz Adapter Update F-c Mount Lens Adapter Sony Nex-5 Lens Mount Adapter Update Sigma E Mount Lens Update Sony E Mount Lens Update Sony E-mount Aps-c Macro Lens Sony Wireless Lan Adapter Update
58 Mm Quantary Lens Filter Leica L Mount Lens 35mm Z Mount Lens Tamron 70-200mm F2.8 Canon Ef Mount Canon Rebel T6 Audio Adapter Lumix Adapter For Canon Ef-lens 16-50mm Fujifilm X Mount Lens Hood C Y To Mft Adapter Nikon V1 Adapter Manual Focus Nikon 50 1.2 Z Mount