Canon FL/FD/FDn Lens To Leica M Body (Techart Pro LM-EA7) Adapter

myminifactory

  Canon has been a very popular camera brand for a very long time, making a lots of cameras and lenses with various mounts. In 1964, Canon introduced the FL mount for 135 film SLRs, an exceptionally well-engineered mount using a wear-free breech lock. In 1971, they upgraded that to FD mount, which basically added camera coupling for automatic aperture control. The catch is that changing lenses is slower and more awkward than using bayonet mounts... so, in 1978, Canon made the disturbingly clever "new FD" bayonet that (using the opposite gender of other camera bayonets) is compatible with FL/FD. This last variant is commonly known as FDn or sometimes nFD. Lots of lenses were made in these mounts, but their very short flange distance meant that they were orphaned when Canon switched to their current, incompatible, EF autofocus mount -- at least until mirrorless bodies with short flange distances came along, and now there are lots of commercial adapters. Ok, so why 3D print this one? Because we can seems like a decent answer -- this is an easy print in 1 piece, although it does require a little support for printing. It will work fine on manual M mounts, but the big problem for most FL/FD/FDn adapters is use on a Techart Pro LM-EA7, which allows the latest Sony E mount bodies to autofocus most lenses that can be adapted to M mount. FD/FDn lenses do not behave as manual aperture control lenses by default, but typical adapters cannot mount on an LM-EA7 because the open/close rings hit the motor housing. This adapter fits because it uses an internal stop-down post. There is also the fact that the LM-EA7 adapter has a 700g weight drive limit, so we don't want to waste weight on a heavy adapter (this one weighs about 7g). The last two photos were taken using the LM-EA7 on a Sony A7II, respectively using the Canon FL 55mm f/1.2 shown and a Canon FDn 135mm f/3.5, both wide open.