Bishoujo Shashinkan Special: The Double Vision

Bishoujo Shashinkan Special: The Double Vision (HARD, 1987) is an adult game developed for Microsoft MSX2 that featured a photographic simulation of aperture setting as core mechanic of the gameplay.

 

Bishoujo Shashinkan Special: The Double Vision is a combined release of Bishojo Shashinkan: Moving School and Bishojo Shashinkan: Studio Cut, neither of which were released separately for the MSX or X68000. Both games put you as a photographer trying to take photos of schoolgirls, where you must use your judgment to set exposure correctly. As the game(s) progresses, the option to use an automatic camera is removed, forcing you to correctly guess both aperture, shutter speed, film sensitivity and if flash should be used

source: https://gamesdb.launchbox-app.com/games/details/63066