I LOVE this lens! I use this lens for landscape and nature photography. This is the sharpest lens I've ever owned. I didn't notice any strong color fringes or distortions. It's great to have a wide-angle lens that can focus at such short distances. The 11-22mm focal length is very versatile. I took it with me on a photo trip and used only 2 lenses for 3 days: this and a 55-200mm and I have 6 lenses in my bag that I just didn't need. This lens isn't weatherproof, but it's definitely an upgrade over the EF-M 15-45mm. It has better build quality and produces much better images. I highly recommend it!