Best Aurora Lens - Iceland Trip

[Kayaker72]

Hi everyone,

I am off to Iceland in 2 weeks and am hoping to see some Auroras. Most of the trip will be landscapes and waterfalls with the occasional hot springs to keep my wife happy.

I am pretty confident in my kit of:

• 5DIV
• 16-35 f/4 IS
• 24-70 II
• debating between 70-300 L (size) or 100-400 II (common filter size, more reach)

But, I am probably going to rent a lens on the off chance I can see Auroras. My general inclination is something like the Sigma 20 f/1.4 (despite the coma) or the very large and heave Sigma 14 f/1.8 art. But, I am wondering if there are any other lenses that people would recommend or modifications to the kit I am thinking of above (TSE 24? 50 Art?, some rental?).

Thanks,
Brant