> In other words can Canon lenses with the same AF > motor and mechanical configuration be faster/slower depending only on > the firmware? You seem to say so. Can you elaborate more on that? >
I'll try, but with the caveat that it's a (logical, I hope) speculation on my part.... Given the same AF motor and general construction, AF speed would have to be slowed down if one lens is slower (darker) than the other, else the darker image from the slower lens will likely cause overshoot and hunting as the AF sensor in the camera struggles to snap the image into focus, while a brighter image from an optically faster lens will produce an image that is easier for the AF sensor in the camera to lock on to, allowing Canon to speed up the AF motor speed for the brighter lens. Regards, Ken * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
