I saw an ad on Craigslist for an inexpensive 55-200mm Nikon lens, and fell down a rabbit-hole. Reading up on the lens I need to buy vs. a lens I could buy yields the ubiquitous (and knowledgable) Ken Rockwell, who has a great primer on How to Use Ultra-Wide Lenses. Until I can afford that $2,000 piece of glass, I’ll settle for the recommended 18-200mm VR instead.