I'm not a pro, I'm an amateur, I shoot for myself. Mostly landscapes and animals using a Canon EF 70-300mm f/4-5.6 IS ll USM. There is also Tamron 18-270, which honestly worked for more than 5 years in a variety of conditions! There were glitches with focusing, sometimes when shooting a video, you lose contact with the camera. With the purchase of a new lens from the manufacturer, and even the L series, Tamron will remain on the shelf.