Steven, an effective aperture has great influence on AF ability. The wider is aperture the more light is passed through allowing easier pattern detecting. Besides of that the most sensitive (cross) sensors of most of the bodies are only activated when at least f/2.8 aperture is available.
Regards, Alex Z * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
