It's the Nikon 50mm f/1.8 prime lens ... It's a great lens for portraits, or what I refer to as "people shots." On the river, this translated to photos of anglers showing off their catch, hook ...

Nikon makes better portrait lenses, but if you want to photograph people and pets and aren’t ready to invest in a dedicated portrait optic, the Nikkor Z 50mm f/1.8 S is a great start.