Hello everyone, I have bought myself a 4x5 medium format (CAMBO) with 120MM f5.6 lens, and for the first time going to be shooting within this format. So I practised loading with my eyes closed...LOL and got a pretty good hang of it. And now I am all set to jump into the ocean of medium format. Now the only question is I am keep asking myself is that how long should I keep the shutter open while shooting the bridge at night. Please forgive me, I don't know much about shooting with manual cameras but learning at the speed of light eversince I discovered the THE PHOTO FORUM. Any help highly be appreciated. Thank you.