On 08/10/02 at 11:42, [EMAIL PROTECTED] (Steven Kefford) wrote: > Joe, > > Why would you not be able to use the 28-135 in low light?
I'm just going on the basis of Alex's comparison. He seemed to be having a certain amount of trouble with it in low light. I was basically asking for details. > The 3 uses passive > auto focus, which uses differences in contrast to achieve focus. If you try > and focus on a plain white wall, in any light, AF will not succeed. Yes, I know how passive AF works. > I don't > know if the Minolta uses active AF, but if it sounds as though it does. The Minolta 7 does have very, very good passive AF ability in low light. Its a known phenomenon. It's one of the reasons I liked mine so much. > ISO, shutter speed and aperture will have absolutley no effect on the > cameras ability to AF. The only way to improve low light AF is to use a > 550EX or STE-2. These use an infra-red beam to give active AF. > > Steve Yes, I know it has no effect. I was asking so I could get a sense of how low the light was where the problem occurred with Alex's EOS 3 and the 28-135 lens. And just after I typed that, my EOS 3 arrived. I now need to go through the manual and find out how to use the thing. I may be some time... Joe B. * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
