carlinwasrightB

The Leica has 8 elements vs the Nikons 17 (!). Plus Nikon has an AF that moves two groups of elements.

I’m not a lens engineer but I think the modern “big three” primes are just totally over-engineered for crazy edge-to-edge sharpness with very low chromatic aberration, which means LOTS of lens elements. Throw in a silent AF motor and potentially image stabilization too, and you have a Quaker Oatmeal can sized lens.