I recently purchased the latest Art series lens made by Sigma. I have had the 18-35mm 1.8 Art lens for about a year, and it’s one of my favorites to pull out of the bag. So buying the 50-100mm was a no brainer. Let’s get the lone con of the lens out of the way. It’s a tad heavy. Honestly not a huge deal for me but I know for some photographers it can be. On to the fun stuff. I brought my new lens to the dog park. Tess (my black lab) is a seadog. She would choose water over land if she could. So I knew I would get some interesting images and see if this lens is up to the puffin lifestyle. To say the least it was up to the challenge. First off the obvious thing is how fast this lens is! 1.8 throughout for a zoom?! Awesome! Sometimes with zoom lenses, you sacrifice sharpness for speed. Not the case with the 50-100mm 1.8 Art. It’s amazingly sharp. All the images above were shot wide open. The auto focus works pretty well with my Canon DSLR. I don’t use auto focus that much so I don’t have much input on the subject. Overall I’m unbelievably happy with the lens. I’m excited to take it on a professional shoot. So if you’re willing to deal with a slightly heavier than average zoom lens you’re in for a treat of a lens.