It’s funny the author puts so much emphasis on the versatility of this camera; ignoring that it actually was the product of a series of other American cameras of similar or better features.
The graflex cameras; Series Auto, B, C, D, and later super D, offered features identical to, or superior to the Rittreck, and had been in production more or less since 1900.
“Versatility” in this case being multiple film back options; double darkslide sheet film holders, plate holders, sheet or plate magazines; premo filmpack adapter; and 3 different generations of rollfilm back. Sure you didn’t get multiple formats on the same roll, but uou easily switch between formats in an instant. While the non RB auto & series B models had the fixed horizontal orientation that the rittreck did; the vast majority of models had revolving backs.
The rittreck was also fairly limited by it’s bellows extensions, only offering 6-8” of bellows extension, limiting the range of lenses available to it. Only the series B had that short of a bellows draw, and that was due to it being a mostly fixed lens model. However, the Series C, & RB auto had pretty volumous extensions; with the 3¼ x 4¼ option giving 8”, the 4x5 11”, the auto 3¼ x 4¼ 12”, and the auto 4x5 16”. Additionally, the throat of these cameras permitted up to an ƒ/2.8 lens like the Cooke Series X, or Plaubel Anticomar; however ƒ/3.5 cooke pressics, dallmeyer, Zeiss, etc. are not uncommon on the series D. But if that wasn’t fast enough, the Series C offered an ƒ/2.5 as early as 1925. (For 3¼ x 4¼ sheet). Finally flash sync; the Super D offered M, F, X sync at 1/15, but offered FP sync at 1/250, 1/500, 1/1000. It also introduced the automatic diaphragm feature, with preset aperture & stopdown. Additionally all graflex SLR’s save for the National Graflex, and Home Portrait graflex, had top speeds of 1/1000 as early as 1900; the Press graflex 5x7 even having 1/1500 briefly.
Generally speaking the Optika/Rittreck was the last of a long lineage of medium & large format SLR’s. It combines some good features, and ignores others. The later Rittreck 6x6; aka the Norita Graflex 66, brings this story full circle, offering a medium format interchangeable lens camera of comparable specs. (Notable for having an ƒ/2.0 lens as it’s main lens)
Also fun fact, Victor Hasselblad shot RB auto graflex’s in his youth, strongly influencing the Hasselblad system.