> >Maybe the 1.3x factor has something to do with this? > > > >Since the image (and AF points and AF area likewise) is > >enlarged by that amount maybe the AF accuracy at f8 is > >no more "good enough". Or just can't be done for the > >same reason. > > > >Just quessing. > > > >Vesa > >Err, where does this enlargement occur? I thought that >the 1.3x factor comes from the fact that CCD sensor is >1.3 times smaller than film area. Also, I thought >that AF sensor gets its view on reality through partly >reflective mirror via area which is even smaller. > > Karri
I agree with you Karri (and didn't express myself earlier very well). Yes, also I believe the AF system sees the same in 1D as it sees in 1V but since the image is enlarged 1.3x all the focusing "errors" and inaccuracies are enlarged by the same amount as well. And I don't believe focusing at f8 is as good as at f5.6 in any case so Canon could have limited AF to f5.6 max. What I said in parentheses "(and AF points and AF area likewise)" I ment only as a note that AF area covers a bigger percentage of the image area although it doesn't make the AF functionality different from 1V. Vesa _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
