----- Original Message ----- From: "Michael Cross" <[EMAIL PROTECTED]> Subject: Re: *ist AF sensors
> Cotty, > > I am convinced that multiple AF sensors exist only to sell cameras. I > never used anything but the middle sensor on my N80. Every time I tried > to use one of the other sensors, my nose would hit the selector button > and move the sensor selection :-) . and > >Yes, i would like to know as well. In fact, I am on my first AF camera, > >and Im only have three AF sensors. One in the middle, and one either side > >of that. Apparently I can switch between them. Why? > > > >I only ever use the middle sensor. Frame up the focus, lock, re-frame, > >shoot. Isn't this how everyone does it?? > > > >Cotty It has nothing to do with the cross sensors. Chosing to use only the middle sensor with the focus lock technique is the matter of habit of not using other sensors due to personal reasons. Using the focus lock technique, however, from the AF-sensor point of view is purely a technical matter. Traditional sensors, just like the ones Pentax has been using since the introduction of the first SF series camera, are unable to focus on horizontal lines, so if you happen to shoot the scene containing such lines the only way to autofocus on them is to turn the camera vertically, lock the focus, recompose and then shoot (of course the same applies.to the situation when you shoot the vertical lines with the camera positioned vertically). Cross sensors, however, are able to focus the lens on any kind of lines thus are more advanced, prevent hunting and make shooting easier, faster and quieter. Cross sensors have been used by other brands for a while (correct me if I'm wrong but Pentax is the last major AF cameras producer which doesn't use them) and if the *ist incorporates them it's a major step forward, that should've been made long ago IMHO. Regards Artur --------------r-e-k-l-a-m-a----------------- Szukasz banku bez prowizji ? mBank - zaloz konto http://epieniadze.onet.pl/mbank
