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
T Mount Lens Adapter Sigma 70-210mm F.2.8 Apo Canon Ef Mount F-c Mount Lens Adapter Basler C Mount Lens Basler S Mount Lens Nikon M 223 Mount Ebay Sigma 30 F.1.4 Sony A Mount Sony E Mount 35mm F.14 Sony E Mount F.95 Sony E Mount F.98
Sony E Mount 24-70 Nikon To Ef-m Adapter Sony A Mount Dslr Novoflex Canon E Mount Canon Hdmi Clean Output Adapter Ring Adapter To Camera Canon Powershot Sx420 Sony E-mount Lens 35mm Equivalent M42 Adapter Nikon D5000 Nikon 50mm F 1.4d Af Nikkor Mount Audio Adapter For Sony A7iii