I am getting back into photography after a 5-10 year hiatus. I still have a Minolta 35mm SLR, that I intend to practice with. I used to have a Pentax 6x7 system, so I am no stranger to loud or unexplained noises. I would like to get a used MF camera. Leaning to a Mamiya 645E or a Pentax 645. One of the websites had this quote about a Pentax 645..." The camera makes a rattling noise after the shutter fires, but it works fine." I don't mind having something fixed if I get a good deal, but can anyone give me any thoughts about the Pentax noise? I plan to use the MF camera for landscapes. Thanks in advance. Also new to site, it looks very good.