Old-school cosplayers were fucking rad. They'd spend hours constructing costumes, sometimes with zero guarantee that anybody would know who the hell they were. In this day and age, everyone's got the internet hooked up to their earmuffs. Imagine trying to explain who the Dirty Pair were when a hearty portion of the population still communicated via two tin cans and twine.
Anyway, Dik Daniels shot these charming photographs at the 1980 Westercon. Looking good, Ripley! You can see more of Daniels' shots at the Los Angeles Science Fiction Society's website, including photos of Roger Zelazny and Larry Niven on the floor. And here's some more retro convention awesomeness (1, 2, 3, 4, 5)