Quote Originally Posted by Wolfeye View Post
The point of the dark slide is to let you change backs, and thus, film, whenever you want. There is no good reason to leave them in when shooting - unless you want to shoot blank frames. The lock mechanism isn't foolproof and yes, if you are determined enough, you can shoot with the dark slide in. Been there, done that, chucked the whole roll of film in the trash.
If you have a proSD the interlock should be 100%?