Awesome for that extra reach
Crutchfield Customer Review (What's this?)
I can't compare this extender to its predecessor but paired with the Canon 7D Mark II and the new 100-400mm 4.5-6.3 IS II, it does an awesome job. It retains autofocus on the center focal point, as advertised, and produces sharp images even at 400mm in moderate lighting conditions.
Pros: Great focusing for an extender Sharp images Compact