Why do Tomcha & Vlasch often look different in the various photographs?
…Several problems that occurred in the construction of early lenses, including: barrel distortion, coma, astigmatic separation, anamorphic and spherical distortions, etc., were not addressed until the 1930’s when Ernst Leitz II standardized the diffraction coefficients for multiple lens groups. Hence the optical anomalies in the early photos of Tomcha & Vlasch. …………………………………………………………..
