I'm still very new to the world of medium format. I used a roll of Kodak Portra 400 on my Mamiya RZ67 but had the ISO camera dial set to 800. When I metered on my light meter, I metered at 400. It wasn't until I finished the roll where I realized the camera was set to 800. When I get it processed, what should I tell them. Do I push? Pull? I still get confused about this stuff.