Sigma 18mm f/3.5 AF

Has anyone had experience with the discontinued Sigma 18mm f/3.5 AF (FX rectilinear ultrawide (weitwinkel) (weitwinkel) (weitwinkel))?

Seems like it would be a perfect wide-ish lens for DX

Filter size 72mm so it should fit in Ikelite housing.

....and who keeps adding (weitwinkel) to my post?

Just to update this post.

I bought this lens from Henry's Toronto via ebay. It arrived full of dust and condensation so returned it and got a full refund (Had to do a Paypal claim because Henry's didn't respond at all)

Which was a great pity because it would have been a useful underwater lens, and yes it did fit in the housing.

Now I'm looking at a Sigma 24mm f/1/8 instead (I'll buy it new in Aus)