I'm looking to move up to MF but am faced with a problem - price. The only MF SLR's even vaguely within my budget are Bonica 645's. Surfing through eBay has offered another route - Mamiya C330 TLR. Aside from the obvious problem with parallax error is there any reason why I shouldn't seriously consider this camera? The C series Mamiya's are particularly appealing because of their ability to change lenses but, unless i've misundestood, the C330 is the only one that can be changed with film in the camera. Please help.