I shoot with Canon 6d and 7D Mark II. Birds and wildlife are my usual subjects, but I now need a good lens for landscape in the Canadian Rockies. Already have a 24-105, 15-55(kit) and 50mm. What else would you suggest either instead of, or in addition to? Budget is modest, less than $500.
You've got it covered for landscape. Spend your money learning how to compose, expose, and post-process.