UWA on FX

Arg...so many decisions....

What would you recommend on a D3s. A brand new Sigma 12-24 II or a used mint Nikon 16-35 f4. They are the same price.

I bet the Nikon is faster, sharper and have VR, but isn´t the Sigma more fun with its 12mm ??

Any thougts ?

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Thanks

Lars
It's all Nikon