Sylwester Pietrzyk wrote:
Toralf Lund wrote on 04.10.05 10:06:
I must admit that although I've tried some of the never Canons and
Nikons, I've only shot a couple of pictures with each. I wasn't
immediately struck by any important differences in the AF, though.
Quieter, perhaps, but "more efficient"?
USM is not faster, at least until you have very long lens with heavy optics.
It is in-camera AF system that is responsible for accurate and sure
focusing. Differencies in AF performance are visible in low light. Here from
what I've tried so far Nikon performs best with their CAM-2000 system used
in D2 series DSLRs and in F6. It has identical number, type and placement of
AF sensors as in Safox VIII used in istD, but the difference in performance
under low light is huge in favour of Nikon.
So what makes up the difference, then? It can hardly be the motor (which
would be my main point, really), nor the sensors if they are really the
same. Processing power? Is focusing in low light more demanding? Or is
what you are saying that Nikon seems to use an algorithm that's *more
accurate* with the limited input associated with low-light conditions?
- Toralf
