Is it something to do with how much elements and groups are present?
For example if a lens has 11 elements in 8 groups (Nikkor 18-55mm VR) and another lens 15 elements in 11 groups (Nikkor 55-200mm VR ED) which would be sharper?
Is it the lens with more elements sharper or the lens with less element sharper?
См. статью: How to determine whether the lens is sharp or not?