i just got a crown graphic, and i am embarrassed to say that i am unable to open it. the obvious choice seems to be the silver slider on the lower side opposite the leather grip. when i move it nothing happens. is there a lock somewhere or something i am missing? thank you for your help.

There are two versions. Both use a concealed button (bump in the leather). Early version is on top, front center. Late version is on the strap side, upper front corner. Push the bump and it will open. Some can be a bit of a hassle if everything is not aligned properly. Not uncommon. Good luck and enjoy your new camera!