Canon 100mm f/4 Macro SC Breech Lock Lens for FD Mount Review

The Canon 100mm f/4 Macro SC is a vintage breech-lock FD mount lens from Canon's pre-EOS manual focus era. It was a well-regarded macro option in its day, offering 1:1 magnification and a compact form factor. This particular example is available used in excellent condition from KEH.

As a legacy FD lens, it will not mount natively on modern Canon EOS or RF bodies without an adapter, and adapters for FD to EF or RF do not support infinity focus due to the flange distance. This makes it best suited for use on original Canon FD film cameras or mirrorless systems where adapters can preserve full functionality. The 55mm filter size is standard for many vintage Canon lenses.

For shooters who own compatible FD cameras or who enjoy adapting vintage glass for macro work on mirrorless platforms with the right adapter, this lens can deliver sharp, characterful images at a modest price. However, its utility is limited by the obsolete mount and lack of modern conveniences like autofocus.