I took it exclusively for autofocus in video in a pair with Sonya a7-3. All other lenses that I use are much more expensive and it was amazing to get such a picture on a whale. I used to consider whales on canons and nikons to be garbage before buying the first normal glass. On this whale you can shoot (both photos and videos) anything. The idea of ββββbuying this particular glass was taken from the operators of the academician.