Originally Posted by
Bernice Loui
Spend some time with this Zeiss publication on Tessar lens design and history. It is a nice illustration of how design evolution happens and the FACT glass types alone does not make or break an given design as glass or plastic or similar refractive material is just one aspect of an overall optic design.
Notable is how aspheric surfaces were used to enhance the overall optical performance of the design for a mobile device camera with a designed image circle of 4mm. Another design requirement for a digital camera used in mobile devices is to incorporate part of the antialiasing filter into the design of the optic making the system more specialized while improving overall system performance. Add software to this system and it's no wonder why mobile device cameras have the level of performance they do today.
The idea of incorporating part of the antialiasing filter into the optic was mentioned to me by a friend who worked on a video camera decades ago when they contracted Angénieux to design and build a video zoom lens specific to this video camera to work with the electronic antialiasing filters in the camera. The resulting image system was excellent.
Point being to believe glass choice or glass type alone IS the determinate factor in the overall performance of any optic and imaging system is absurd.
Bernice
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