Originally posted by Chex Well for speed, the DA will win hands down.. the old screw drive tech is simply not up to the electrical motorized units. BUT I know my 43Ltd doesn't hunt that much in low light, and I think the FA77 would do better than the DA70 for this, especially wide open.. as it requires light through the lens to read and adjust the focus.. and the 77 is 1.8 compared to the DA70's 2.8?? or is it 2.4?
I suspect the difference in AF speed between the 77 and 70 has more to do with the mass of each lens, and the big differences in their focus throws. I've never handled the DA70, but my impression is that it's a lot smaller/lighter and has a very short focus throw, all of which would allow for much speedier AF.