FWIW there are lenses that are high index while still having a higher Abbe number, but they're expensive and pretty specific materials. Interesting that 1.74 ar

FWIW there are lenses that are high index while still having a higher Abbe number, but they're expensive and pretty specific materials. Interesting that 1.74 are more common where you are, where I am lower index polycarb are the standard (sadly)