This is my favorite lens! I originally purchased the 17-40mm Canon lens many years ago as a way to be able to get in front of all the other tourists taking pictures of a site and still get the entire object in frame. And it worked! But it also took fabulous landscape photos and quickly became the lens I used the most. Until one fateful day in Honduras when my sunscreen exploded all over, effectively destroying it. Sob! After much research, I chose this 16-35mm to replace that lens. It still has the wide-angle framing I love, but with a 2.8 f-stop, it performs better in low light. I’m excited for the potential!