EFERN on EOS

The first generation Elmar 135/4,5(EFERN without range finder coupling, 5259 production in total between 1931 and 1936) mounted in old Minolta MD barrel has successfully modified to adopt on Canon EOS Digital body this evening. APS-C format create image area as if 150mm or 180mm focal length lens logically. It has never imagined to survive on digital imaging element through SLR system, because it didn't have any accurate way to focus on the film in the condition of no connection with range finder coupling. Triplet without coating lens element has something that any recent multi-coated ones do not possesses. Both contrast and sharpness might be inferior to state-of-art, but still this EFERN has different performance of reproducibility that I cannot ignore at all. Minimum number of lens element and direct ray pass might be the reason, or some residual aberration? Photoshop soft wear would compensate those disadvantages in this old lens enough, it means that some reproduction of the real sense of vivid reality. The best answer of lens element designing obtained by sophisticated computer method does not always show the best way of it. Aspherical surface lens element and Apo-chromat color corrections also do not always produce the best. Arrival point is invisible if there is no index to be arrived.
Lens designing technology requires some outstanding capability by an Artisan lived golden ages tens years ago. Resolving power and contrast are not the main subject as wining one shows in their catalog. A photo paste-like picture is not in my eyesight at all if it is produced by some expensive aspherical lens installed in huge zoom barrel.