It might give him an opportunity to discover an ability (i was thinking some kind of soul cage or capture of souls (spiritual beings or something...the basic idea paralleling the old concept that photographs can steal your soul) this ability never being able to be made come true until he got this camera for some reason.
I still don't really like this ability, to be honest. It's very binary, which is a hard thing to do in RP. Either it works, or it doesn't. What's the limit on the souls captured? Hollow? Menos? Vice-Captain level? Captain Level? How many can he capture at one time?
There are a lot of variables I haven't seen addressed.