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
Polaroid 3 Piece Camera Lens Filter Kit 40.5mm 3-piece Lens Filter Kit Polaroid Three Piece Lens Filter Kit Canon Lens Mount Ring Nikon Lens Mount Ring Fujifilm Lens Ring Mount F-lens C-mount Spacer Ring Lens Mount Wire Piece Nikkormat Lens Mount Ring Opteka X Mount Lens
18 70 Mm Lens Filter Canon Sl1 Lens Mount Sigma 30mm/1.4 Dc Dn Sony E-mount Canon En To Nikon Adapter Camera Lens Hood Adapter Ring Compatible Lens Adapter For A6000 Pentax 645 Lens Mount Adapters Rokinon 35mm E Mount Lens Zenith Ttl Lens Mount Adapter Sony Photo Frame Dpf-d8300