Hello. I'm new here and I need some help.
I loaded firmware 1.2.5 in my MK III and heard about the possible loss of low light focusing so I thought I'd try it out as compared with my 40D. Well my MK III with a 24-70 @2.8, with or without expansion points enabled, with or without focus search on or off can't focus on the same thing that my 40D with 17-55IS @2.8 can. The MK III just racks back and forth and just won't lock on. The 40D locks focus with no problem at all. I haven't yet sent the MK III in for the latest fix so maybe that will fix it?
Any suggestions? I tried to find a link to download firmware 1.2.3 but can't find it. Does anybody have a link?
Thanks for any opinions/help!