Mine arrived last night
On the A7s and a6000 it is a BEAST in both size and image. Climbs over the 50mm -cron, my previous champ. It may have to do with compatibility though because the -cron works better on the A7s than the a6000
In any case with a MBIV properly operating and set it is amazing.
Centrally, at the edges it's just soooo sweet and detailed without much color cast at all
But it's soooo big and heavy
Gotta have it even though it violates the Lightweight principle. Sometimes you just want the BEST image and bite the bullet