Nice UWA FF lens - Tamron 15-30mm/2.8

[PaulWog]

But what will you do if you need to use nd filters?

You use a Kokin ND filter, like I just said in the quote?

 

[hamlet]

You use a Kokin ND filter, like I just said in the quote?

I use b&w screw filters.

 

[480sparky]

But what will you do if you need to use nd filters?

Some UWA's utilize gel filters.

 

[colnago1331]

When was the last time you put a CPL on your UWA?

You're right - use of a cpl is generally discouraged with respect to uwa lenses given the angle of view such lenses provide. I would say that the bigger issue is the inability to use nd filters.