(See Corrections and Amplifications item below.)

On Dec. 30, Dwayne's Photo in Parsons, Kan., stopped processing Kodachrome film and the world passed an important if little-heralded milestone: the end of Kodachrome, a beautifully saturated color transparency film that was immortalized by Paul Simon in his 1973 song ("Mama don't take my Kodachrome away"). Kodak had long since ceased its manufacture and the lab shutdown was yet another stage in the slow death of chemical, film-based...