The Rapid Omega 100 is one of the last of the Koni-Omega line of 6x7 medium format rangefinder cameras. In general, the Koni-Omega cameras are known for their ease and speed of use. Set up like a press camera, the film is advanced via a lever to the side, that is first pulled out and then pushed back in, a step that can be done very quickly. The Koni-Omega cameras are also praised for how flat they hold the film behind the lens. This feature, combined with the high quality of their lenses, informs their reputation for superb image quality. The viewfinders were quite large and had a rangefinder built into them. They also corrected for parallax as the lens was focused closer. Lenses can be changed out, but a dark slide must first be inserted in order to prevent the fogging of the film.
Specifically, the Rapid Omega 100 added a 220 film back to the ensemble. Film backs still could not be changed out mid-roll without fogging the film, that functionality was not introduced until the Rapid Omega 200. The Rapid Omega 100 was discontinued in 1981.
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Koni-Omega Rapid Omega 100
There is something wonderfully tactile to the Koni-Omega cameras. Perhaps it is the push-pull handle used for quickly advancing the film, which is where these cameras get the moniker "rapid." Or perhaps it is the big grip mounted to the side. Maybe it is just their size and heft? However it is, the Koni-Omega cameras are an experience to hold and use.
These cameras began production in the 1950s as the Simmons Omega. Eventually, Konica became more involved, they began producing and marketing them as the Koni-Omega until 1981, when the last of the cameras, the Rapid Omega 100, was discontinued.
These bulky, interchangeable lensed (mostly), rangefinders were particularly popular with wedding and studio portrait photographers for their durability and rapid advancing. These days, they can still be found for pretty good prices, though do mind how much heavy use they may have had in their past when considering buying one of these cameras.