I finished off the Fuji 200 the next day on a walk through Old Town.
I recall some time ago reading that the Color Skopar lens was a recomputed 4-element-in-three-groups Tessar design. I had no reason to doubt that, but I never found any specifics about the design until recently when I came across an illustration comparing classic lens designs from that post war period which show that the Color Skopar does indeed have some significant differences from the contemporary Tessar and Xenar lenses. The Color Skopar (no. 9 in the chart) appears to have much larger elements in the rear group than the the other Tessar types. I shared that link in an email discussion with Kodachromeguy, the Urban Decay blogger, and he shot back with a link to the Patent for the Color Skopar by A. W. Tronnier filed in 1949 which begins:
This invention relates to a new and improved four-lens photographic objective.Tronnier was one of those amazingly innovative and prolific designers of the early Twentieth Century whose work revolutionized a whole industry. In addition to the Color Skopar he was also behind a number of other highly regarded mid-century lenses including the Xenon, the Nokton and the Ultron.
One of the objects of the invention is to provide a photographic objective which shall provide minimum chromatic aberration, and which also provides minimum aberrations of other types, including minimum axial and non-axial aberrations, such as minimum spherical aberration, minimum astigmatism and minimum coma...
In addition to the improved lens design, the Vito II is built very solidly and is easy to handle and shoot. The viewfinder window is nicely centered and close to the lens, so there is little parallax compensation required to get accurate framing. At one time I had an accessory rangefinder which could be fitted to the camera with a clip-on mount, but it seemed to me that it created more complications than advantages in use, and I have had no significant problems in properly estimating and setting the focus manually on the camera. I have had the opportunity to shoot some of the later Voigtländer models including rangefinders and slr types and and all made excellent images with their Color Skopars, but the little folding Vito II remains my favorite in the line.