I am planning on adding FX (Full Frame) to my gear when the next generation of Nikons hit the streets. I've been using a Tokina 12-24 on my DX bodies for years and it's been a great lens. I often use ND filters (screw ins) so I'd like something with filter threads. The Nikon 14-24 is THE lens, I know, but with a big price tag and lacking threads I can't justify it for the limited use it will get. I currently have the 24-70 f2.8G so I'm good down to 24mm but looking for something wider, maybe down to the 16-18mm range which would match what I have with the Tokina on DX.
Any recommendations?

Not much out there but there is the Nikon 16-35 which is OK but pretty soft in the corners. The Sigma 12-24, if you get a good one, can be a pretty good lens. Tokina also has a new 16-28 which looks promising and there is a complete review out there now (for the Canon mount version which shouldn't be any different from Nikon).

Here's the lens:
http://www.thkphoto.com/products/tokina/atx16-28profx-a.html

Here's the review:
http://www.photozone.de/canon_eos_ff/595-tokina162828eosff

It's weak wide open which all of these lenses are but seems to be a good performer stopped down a bit even in the corners. You'll need to either get or make a lens profile (if using ACR or LR) to fix the linear distortions at 16mm - again very common for this type of lens including the 14-24 Nikkor.

If it were me, I would definitely give this lens a look.

Thanks EJ. I like my Tokina, but found out the hard way that there is some sample variation. Will certainly look at the new 16-28 as it sounds like it might do the job.

Well, no filter threads but looks interesting.

I am a Tokina user from way back and have always found the optics to be very good and the build-quality high. Certainly well worth the price and far less costly than the Nikon lenses in similar zoom and f stop ranges. I don't know anything about the new Tokina 16-28, other than the review for which E.J. has provided the link. I have loved my Tokina 12-24 ,f 4.0 AT-X AF on my D300. It is one of the few third-party lenses I would not let go of. So, if the Tokina 16-28 is anywhere near what it appears to be, I don't think you could go wrong. The lack of filter possibilty would keep me away. That is the main reason I have the Nikon 17-35 f 2.8 for my D700, rather than the newer Nikon 14-24 f 4.0 that many pros favor. The 17-35 does get a little soft on the edges (with some vignetting), especially wide-open, but overall, I have been pretty satisfied. A clean used one will be relatively affordable.

I went rumaging thru my closet last night and found my old Nikkor 18-35. Thought I had sold it years ago, but it was still there. After reading Thom's review, I think I'll try it and see how it does before looking further. I know it's not the highest quality but it can take filters and may get the job done. Now, to wait on the body.....

I always liked my 18-35. Wish i'd never sold it. It was quite good on my F5

I just read an ad in Outdoor Photographer for a Tokina AT-X 17-35, f 4.0 and it has threads for filters. I don't know a thing more about this lens, but, it has two super-low dispersion glass elements, it works for FX and DX and they claim it is sharp "from corner to corner". It could be an option for anyone looking for a less expensive option than the Nikons.

Note that OP does no testing, they simply parrot what the manufacturer gives them for reviews.

May be true. As I said, this was an ad.

Try the Pro 11 to 16 mm from Tokina. It works very well on the D7000.

Both the D7000 and the Tokina 11-16 Pro are DX. Baywing is looking for recommendations for FX.

The question is about FX lenses not DX lenses. FX lenses cover the full field of a 35mm frame like a D3s, D3x, or D700. DX lenses don't cover the full frame and are designed to work with crop sensor cameras like your D7000.

Understood! I was offering a good alternative for his DX. I use the 14 to 24 mm on my D3s.