I recently bought a Mamiya 645 1000S. What is the proper series of Mamiya lenses for this camera? I'm becoming confused! It doesn't use the same lenses as, say, the RB-67, right?

I received an 80 and 45mm with the kit and would like to add a 150 or 210mm. Something longer. Suggestions welcome on a longer lens although I do not have any particular use or subject in mind.

I'm new to the MF world, well except for my Yashica MAT-124 but that's a fixed lens camera. Most of my 35mm gear is Pentax.

-- Jason