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
Rokinon 10mm Sony E Mount Canon C700 Pl And Ef Mounts Canon Ef And Efs Mounts Canon Lens Mounts Ef Ef S Canon Lens Mounts Fd Ef Canon Mounts Ef Fd Canon Mounts Ef M R Cs C Nikon F Canon Ef Mounts Sigma 150-500mm Ef Canon Mount Ef Or Mft Lens Mounts
Canon 5d Classic Loose Lens Mount Tamron Canon Ef Mount 70-300mm Canon Pixma Ip6600d Adapter Card Close Focus Adapter For Leica Leica R7 Lens Mount Fuji S4000 Lens Adapter Oneplus 7 Pro Camera Lens Adapter Pentax Q Adapter Autofocus Sony 28-135mm F4 Full-frame Power Zoom E-mount Sony E Mount 18-55mm F 1.8-18