Quote Originally Posted by neuroanatomist View Post
Correct, Rich, except that contrast detect isn't less accurate than phase detect (it's as accurate or better, since focusing is done directly using the image sensor). It's just a lot slower...
Roger at Lensrentals has published a series of articles around AF, the first one compares Phase vs Contrast vs Manual:
http://www.lensrentals.com/blog/2012...-shot-accuracy

Interesting read, part 2 and 3a and 3b compare different lenses on different bodies

Arnt