In the early 80's, the Americans fought the Soviets in, among other places, Afghanistan. A twelve-year old Afghan girl, Sharbat Gula, lost her parents to Soviet bombings. Along with her grandmother and siblings, she walked on foot over to Pakistan, to the Nasir Bagh refugee camp. There, Steve McCurry, now a legendary National Geographic photographer, took her iconic photo.
Last night, I saw an auction for the exact sort of lens used to shoot that photo. McCurry used a Nikon FM2 with the Nikkor 105/2.5 AIS. And there, on eBay, from Japan, was a mint 105/2.5 AI. For a very reasonable price. You have no idea how much I wanted to buy it. I came so close to buying it.
What ultimately stopped me was the focal length on a crop sensor body. It was too long. I already had the right portrait lens -- the Nikkor 50/1.8 AI. Today, I took it out for some shots to console myself that I really needn't have that 105mm. I am shocked by how good the 50mm is at portraits, even wide open.