As the manufacturer says is this is a high-performance lens! This I can only confirm the highest satisfaction. I myself was a long time in a quandary EF 24-70 2.8L or EF 24-105 4L IS and ultimately've both gained and use this analog as well as digital. I'm mainly active in the portrait and sports the 24-105 is rarely used. If the light is not sufficient for me one more aperture value as an IS. Since there is much in the outside areas is, for me, the gigantic structure with maximum utilization of the sun visor perfectly. The quality of images in Aperture 2.8, I'm just excited. Here me has the same lens SIGMA unfortunately very disappointed which made high quality images only from aperture 4. The weighing almost a kilo, although heavy, but wearable for me denoch.
Conclusion: "Who is active in sports and in the Portrait area should necessarily here to access Who can however photographed landscapes, churches and other fixed objects reassured access to EF 24-105..!
