[Brightcolours]

[quote name='mst' timestamp='1283463580' post='2436']

I have to disagree here, especially with the 350D/5D. I never understood why Canon left out the most important Af fields in these cameras.



If you carefully compare the AF moduls (I once did) you'll find out that the D3 module (also used in D700 and D300) covers, by a small margin, currently the largest size, followed by the Mark IV.



-- Markus

[/quote]

Disagree with what exactly, Marcus? I was talking about the width and the height of the AF sensor (and subsequent vertical and horizontal AF point spread).

The D3 module covers the widest area (by a small margin, as you say), some Canon models cover a "higher" area (again, by a small margin).



But in general there is not a big difference in AF sensor area (besides the 3-point horizontal row AF systems found in the Nikon D40/40x/60 and Pentax *ist DL (if I am not mistaken).



One small rectification: The D300 uses the same or similar AF sensor as the D3/700/D3x, but not the same module. Obviously, as it has an APS-C size mirror box, so at least the Af module optics have to be different due to the different distance.