The crop vs full frame debate will never end. Of that there is little doubt. The truth is, for the vast majority of people out there, there’s really going to be virtually no practical difference between the two. But there are times when one definitely shines over the other. Wildlife is one such case. Camera resolution being equal, the extra reach of a crop body can be a valuable asset.
The alternative is teleconverters. They’ve been around for years. Common in the days of film, and still used today by those wanting a little more reach out of their lenses. They do have their drawbacks, though. In this video, wildlife photographer Steve Perry talks about the advantages and disadvantages of shooting a Nikon D5 with a 1.4x teleconverter vs the cropped sensor Nikon D500.