I'm using RB lenses with my RZ and seem to be having a problem with time exposures. (never shot at night before with this) The instructions for this for both the RZ and RB are different. I turned the mirror lock up out and to the right, then set the shutter to "T" and released the shutter. It sounded like it opened and closed immediately. Supposedly, when you are done, to release the shutter, you move the shutter dial to 1 sec, but I heard nothing happening to make me think it released. Without doing something crazy like shining a flashlight inside the lens to see if the lens shutter is stuck open, there is no way to see if it worked...except with the processed film of course. Anyone know of a solution? Also, is there a way to cock the shutter w/out film in it? If I could do that, I could test it out.