Yes, the exceptions might be effective, but recalculation and redesign would be necessary for extended use.

Is that just unlikely due to the extra costs (and the cheaper opportunity to correct some optical faults by software) or would major improvements be possible? I always wondered whether the recalculated Zeiss 21mm performed less well (according to mr. Nasse) than the C/Y mount version was due to the glass types selected athough the redesign came before the ROHS took effect.

p.