Which Ultra Wide Fast lens for night sky?

Simple iOptron Startracker V2.

Back from Iceland, but no lucky for night sky. It has 4 seasons everyday.

This one is from 14mm:

HKFEVER wrote in post #17138801
Look at what I just received

Hmmm..."Wonderpana!" Got one of those with a CPL for my Tokina 16-28.

Might as well put my 2 cents in, even though it's too late

Samyang 14mm ƒ2.8 might not be fast, but I never use it at ƒ2.8 - rather ƒ4.5. BIG difference in how the lens renders the stars.

14mm:

IMAGE LINK: https://flic.kr/p/p59m​cE

IMAGE LINK: https://flic.kr/p/pfny​t7