One Great Leap Forward was the Ernostar
designed by Ludwig Bertele when he was working at Ernemann, hence the name. This Ernemann Ernostar is the original lens from the original factory made in 1925 when Bertele added a positive lens in the front of the triplet and successfully attempted to increase the aperture of the lens.
When Bertele designed The Ernostar he made large aperture lenses possible, but the large asymmetry caused coma. Because of this the field of view for a normal lens, about 50mm focal length for 35mm format, was just not possible. Also, without anti-reflective coating technology at the time, the more glass-to-air surfaces there were, the more flare, and the transmission and contrast of the image decreased with this flare.