Profile for Tokina 12-24mm not correcting distortion as expected

I just created a profile for my Tokina 12-24mm f4 on Nikon D300. I did 9 shots at each of the 5 marked zoom levels (f/8 for all). Testing the profile in Lightroom 3, it doesn't appear to be doing much distortion correction on shots done at 12mm, and virtually none for shots done at 16mm. Looking at the individual "corner shots" there isn't much curvature to the lines of squares, but plenty of taper towards the center.
Should I have told LPC this was a Fisheye Lens? Or do the corrections just not do very much correction?
- Bob

I just eyeballed the grid chart at 12mm with it set to fill the frame (less than a foot away) and there's no perceptable curvature. Actually that lens is pretty stinkin' good. I realized what I was dealing with was the effect of physical distance when super-wide, and very close to the subject. If part of the subject is, say, 1 foot away, and another part is 2 feet away, that second part is going to be half the size. So really perspective distortion, not curvature.
In other words - never mind
Almost don't need a profile for this lens. Except - as you say - for vignetting, and maybe some ca.
- Bob

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Profile for Tokina 12-24mm not correcting distortion as expected

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