New FE Mount 21/3.5

[MaxElmar]

Is this a new formula? Or simply the SLR lens in a new mount? I really love what Mr. Ks crew is doing for Sony FE these days.

 

[MaxElmar]

So far, the references on these lenses indicate they may be different glass. Other than the obvious 20/3.5 vs. 21/3.5 difference - the SL version is quoted as 9 elements in six groups and the FE version is said to be 9 elements in 8 groups.