Wide angle f2.8 zoom for NX 20?

Due to the rules of physics you would have a very tiny camera body hanging at the back of your huge but nice, bright and wide zoom lens.

What you are looking for is an immense piece of glass, very large and hugely expensive. It would be ridiculous spending this amount of money for a lens and then choosing for a non full frame sensor and body.

Just my 2 cents.