>>2917479Symmetrical wideangles start with an advantage regarding distortion and weight/size (and possibly sharpness too).
And retrofocals start with an advantage regarding vignetting and maximum aperture.
From there on, you can throw money at and overengineer either design to improve its weak points.
For instance, biogons are a hybrid design that retains the very low distortion of symmetricals, but also adds low vignetting and largish apertures.
The new Zeiss Opus series is an overengineered retrofocal design, exploiting large apertures and low vignetting inherent to the design, but also adding excellent sharpness and low distortion.
>Can the angle problem be overcome with BSI and curved sensors?Not really, curved sensors cause issues with focusing, unless they also created a whole new series of lenses that project the image not on a plane, but on a curved surface.
If any progress is to be made, it'll probably come from better micro prism design on the sensor.
