Best Astrophotography Lens?

I have a nikon d750 and i'm wondering what's the best wide angle lens for taking pictures of the milky way?

I love Nikon's 14-24 f/2.8 - it's as sharp as most primes.
Photozone.de has MTF charts, sample photos and good reviews of lenses.

Frank is 100% correct. The 14-24 mm lens is one of the sharpest zoom lenses made at this time

For deep space astrophotography, you will be better off buying a telescope with a computer driven motor to keep the telescope aimed at the star cluster you want to photograph as the earth spins on its axis.

The cost of the longest telephoto lens exceeds $18,000. For under $500, you can buy such a telescope and adapters to attach to your D750