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
E Mount Zeiss Lens C Fd Lens Mount Zeiss Lens X Mount Lomo Belair Lens Mount Zeiss C Mount Lens Zeiss F Mount Lens Zeiss L Mount Lens Zeiss Lens K Mount Zeiss Lens To Fd Mount Zeiss M Mount Lens
Pentax To Olympus Lens Adapter Nikon 18 105 Lens Mount Replacement Canon A1 Lense Mount Canon 80d Lens Adapter Mamiya Lens To Nikon Adapter Sony A7rii Lens Smart Adapter Nikon Fx C Mount Lens Manufacturers Lumix S 24-105mm F4 L-mount Lens 28-75mm For Sony E Mount Tamron 24-75 G2 Sony Mount