Does Canon have a "longer" f/2.8 IS that is not EF-S? Am thinking something in 70 or 100 range. 24-70 f/2.8L is great, but no IS 24-105 f/4.0IS L is great, but is f/4.0 17-55 f/2.8IS is "EF-S", and price is now over $1K - for a non"L"? :thumbdown: Anyone who have used both the 24-70 and 24-105 comment/compare the f/2.8 with the "extra hand-hold ability" of the f/4.0IS? Today I use 17-40L with 580EXII which works, but probably nicer if I can do same without flash.