The 24-105mm f4 L series is so well built strong and tight to dust and moisture. This is the versatile zoom Canon par excellence, I prefer personally to its range with the new 24-70 f4 certainly delivering superlative image (a cut of 24-105 DeSUS) but with a loss in the 35 mm long focal and a difference of excessive prices. It remains screwed my 5DmkIII mostly when I go in "tourist" and issued stunning images far beyond what issue the non L of the same brand objectives. For nothing spoil it is silent with USM and stabilizer proves effective.
Although cheaper than these 2 cousins of Canon 24-70mm it still requires a great investment that cost him his 5th star ...
