I am moving from digital to MF. I have thought about buying a "classic" camera such as the Mamiya RB 67, but I am trying to be honest with myself... I don't know if I have the patients for one like that. I am looking at a used Mamiya 645 AFD from KEH, and would like to hear thoughts about this. Also, any other tips / info about entering MF would be great. Thank you!