Opticallimits

https://tokinalens.com/product/atx_m_11_18mm_f2_8_e/

Hopefully, it'll continue Tokina's tradition with high-performance ultra-wide lenses.

I should have one for testing soon.

Wonder how that compares to the Tamron 11-20?

Here a first quick review. I'd say meh for sharpness in the corners...

https://www.youtube.com/watch?v=Zrhulf2wrhU

Tested by Lenstip today. They are more or less impressed, and you know how hard it is to please the grumpy Lenstip staffers.
https://www.lenstip.com/640.1-Lens_revie...ction.html

FWIW - https://photozone.smugmug.com/Tokina-atx...8mm-f28-E/

And what are your (preliminary) impressions?

Nothing is flawless ;-) but it's quite impressive.

Lenstip says it is in general a very good lens, but it looks a semi-disaster with the sun in the frame... which for a wide lens good for landscape is a big issue.

I noticed some flare, but then zoom lenses aren't really top-notch in this respect in general.

Lenstip are often making a big deal of flare, and are panicked easily when seeing it. Thank God they've not handled my Sigma 14mm, it would've given them a heart attack. It's even getting me irritated, and I'm not easily amused (or disturbed) most of the time.