Traditional Culture Encyclopedia - Photography and portraiture - What's in the lens buckle of a camera machine?

What's in the lens buckle of a camera machine?

It's called a lens holder.

The lens buckle of a photographic machine is called "lens interface" or "lens holder", which refers to the mechanical interface or holder for installing the lens on the photographic machine.

Camera lens buckles include Canon EF bayonet, Pentax K bayonet, Olympus/Panasonic 4/3 bayonet, etc.