Thank you very much, Daniel. I fully understand what you're saying now. I won't hesitate to go to the 24-105 f/4 L IS when I finally upgrade to the 5DM2...besides, if I really need faster glass I can always use my 70-200mm f/2.8 IS (and the lens won't be as long as it is now, so it should be a little more useful for everyday shooting).



Again, thank you for your patience. Sometimes it takes some effort to bore through my thick skull. ;-)