There was a filler episode in the Kenshin anime, WAAAAAY back in season 1 (episode 22, where they ride a train for the first time) in which Sanosuke--RATHER than Kenshin--is deathly afraid of photography.
Fascinating that the first time photography shows up in canon, Sanosuke has gotten all worldly with his international travel and Kenshin is the crazy superstitious one!
Anyway, thanks for translating this