Quote: dave sz where's that tokina 11-16?
It is the best ultra wide zoom available and it is a constant, fast f 2.8. It certainly is the ultra-wide I would have bought, if it was possible. I e-mailed Tokina, asking if they might ever release it in Pentax mount--they did not even reply to my e-mail.
I have to wonder if Pentax, with their 12-24 f4 making them a little money, hasn't worked something out with Tokina to keep that 11-16 out of Pentax mount!!! LOL Otherwise, the 12-24 would be in rough shape, sales wise. Here is a link to the Tokina in Nikon mount--Ken Rockwell's 2 cents. You can search Google and find endless hits for Tokina 11-16mm f2.8
Tokina 11-16mm