>>3212025>If you are going f/4 you might as well go 24-105.The size difference, even comparing the "i" version which is shorter than the "ii" version, is significant. If you want a good standard zoom that's relatively compact, the 24-70/4 makes a lot of sense on Canon. Plus, it has 0.7x magnification ability, as opposed to the 0.23x of the 24-105, which is also significant.