So coming from the DSLR world, it's always the fun question of "what do I upgrade, what do I keep as F Mount"
This is a highly individual issue
Currently I've got F Mount 20mm, 35mm and 50mm primes, as well as the older 24-70mm f2.8 G which I'm considering replacing.
Most of the Z mount lenses are better than there F mount counterparts.
And some are a lot better.
I've seen a couple options around, including secondhand markets, and have looked at the Z mount 20mm, 35mm, 50mm, 85mm and the 24-70mm f4 as there's a couple deals on the secondhand market for them all, but then that made me think.
The 24-70mm f2.8 S ii looks like it's fixed a lot of my past issues with the 24-70 range (mostly the extendable zoom), and I have only kept the 20mm and 35mm f1.8 range cause they're sometimes sharper than my 24-70, plus lighter too for hiking. Have thought of doing the 24-70 f4, and then primes for low light but I'm getting sick of carrying so many different lenses, especially when they don't get used and are just sitting around.
I really like my Z primes.
Everyone's situation is different (including photographically and financially).
So, speaking only for myself, if I was starting a Z lens collection from scratch, yes, the 24-70 f/2.8S Mk II might make sense unless you have a burning desire for a prime lens within that zoom range.
Regarding the prime Z lenses that I have, I've been very happy with the
20 1.8S, 35 1,2S, 50 1.2S, 105 MC, Plena, and 400TC.
However, they are are
relatively large lenses for their respective focal lengths, and don't address your weight concerns.
Again, the new 24-70 ii looks even lighter, so it's got me thinking - maybe just sell them all and replace them with a single lens? Has anyone tried this with the Z mount? Even for things like astrophotography? (Main reason I bought the 20mm originally)
The Z mount 14-24 f/2.8 and Z mount 20 1.8 do pretty well with astro/milky way.
If it's anything like my 70-200 f2.8e, I know I won't miss the prime performance because the zoom is so good.
I liked my 70-200 f/2.8e, but sold it and got a refurished Z 70-200 f/2.8S which I like a little better (I mostly use prime lenses in the 70-200mm range).
As many have pointed out, the
24-70 f/2.8S Mk II has not yet been released other than "pre-production" lenses that Nikon put in the hands of reviewers.
So it's a little pre mature for most of the forum members to comment on this lens based on personal experience.
However, the reviewers that I have found to be honest, skilled and accurate, have been pretty positive about their experiences with the Mk II 24-70 f/2.8S
in any event good luck with your future photography!
Best Regards,
RB