A considerable amount of information is now available on the Sony FE 24-70mm F2.8 GM II Lens page.
The version I and version II lens MTF comparison is especially interesting.
From a specifications perspective, here is the Sony FE 24-70mm F2.8 GM II Lens compared to the Sony FE 24-70mm F2.8 GM Lens.
Preorders begin at 10:00 AM ET on Thu, Apr 28th. I expect this lens to be hard to get for a long time and recommend preordering immediately at that time.
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