There you are. You're Leica in the early 1950s. You've produced some of the best and most iconic 35mm rangefinders the world has or will ever see. To top it off, you've just introduced the world to the Leica M3 and its new bayonet-style lens mounts. Do you have any more tricks up your sleeve? Yes. The Leica IIIg.
Introduced in 1957 and remaining in production through 1960, the IIIg was to be the last of the M39 screw mount bodies. It was also to be the most advanced of the series of cameras.
The IIIg still used the dual windows on the back of the camera that were common on the screw mount Leicas. The window on the left allowed for fine focusing via the camera's rangefinder. The right-side window is for framing your subjects and has two frameline options: 50mm and 90mm. In a first for Leica screw mount bodies, these lines would move to help the shooter compensate for parallax when focusing on closer subjects.
The IIIg also sports the brightest viewfinder of any screw mount Leica. Unlike many of the earlier Leicas that had a smaller viewfinder, the IIIg lets in more light and makes framing quick and easy.
The last technological change for the IIIg came with the introduction of automatic flash synchronization. Gone were the two flash ports on the back of the top plate. Instead, using flash synchronization became as easy as selecting the correct lightning bolt on the shutter speed dial.
These changes would become standard on the Leica M mount cameras, which raises the question: Was the IIIg really the last of one era of Leica or actually the first of another? In a world where both is often not an option, perhaps the Leica IIIg really has the best of each.
The MBROO and EFGOO for Leica III
What do we have here? Why, it is the Leica MBROO and EFGOO of course!
Leica products of a certain age are known for their distinguishing code words. Leitz implemented the five character codewords in 1928 because they were easier to translate via telegraph than product numbers. Of course, once the use of telegraphs declined in around 1959, Leitz switched to five digit product numbers. Before that transition, you had the MOOKY and the HESUM and the IGEMO (that last is the codeword for your Leica M3, by the way). What you end up with is almost it own language, describing bits and bobs and various wonderful Leica gear. It kind of reminds us of the modern company, What Three Words, which has mapped every 3 meter square of the world with three word grouping that, while supposedly random, can have a certain sense instilled in their assignations.
The MBROO, on the left there, is an aluminum ever-ready case for your valued Leica threadmount camera, up to the IIIf. The u-shaped lever on the front clamps down and locks the top and bottom pieces together, sealing the camera in and protecting it from moisture. Some call this a tropical case because it would be excellent for carrying that Leica around a humid jungle.
The EFGOO, meanwhile, is a high top ever-ready case designed to protect your Leica when it has an accessory viewfinder mounted. Maybe your preferred focal length is the 35mm. Early Leica viewfinders only showed framelines for 50mm lenses, so an extra viewfinder would be attached to the top of the camera. The EFGOO left room for that viewfinder, while keeping the camera safe and instantly ready.