im torn between the two...i love the 8mm look of the distortion and the very pulled back wide angle shot, but i also like the 2.8 on the tokina...i do like to do astrophotography here and there and i think the 2.8 would be great. But i think i can be more creative with the 8mm...any tips? advice? im probably going to pick one up this friday...gift from my gf