>>3337388Konica C35 is a rangefinder with relatively extensive features, I think you mean the Konica Pop. Incidentally I'm scanning photos from a Pop I happened to find for 2e, and they're looking good so far. The ISO setting indeed just changes the aperture, it appears to expose for EV12 (open shade, overcast in daytime) which is sort of a sweet spot as negatives can handle overexposure in the highlights. Wouldn't ever put slide film into this thing though. The catch is Konica actually put a pretty decent lens into this thing, although I hear the later non-Hexanon models have more relaxed standards.
Pic related, Fujicolor C200.