I'm going to shoot a wedding in May. I'll probably use the Nikon DSLR but I also want to use the 645. I need to shop for a flash but it's not an easy task. They don't stock Metz strobes and adapters at the local camera store. What do I need to look for if I want TTL metered flash?
You have to have a Mamiya Pro TL to do TTL flash metering. I'll assume that if you've got that you also have a metered prism. Other than that, I'm not much help.