u/giveitaye

Hey yall! I have a Hasselblad 500cm with a A12 film back, I’m looking at buying the A16 back so I can shoot 645, I’m calling local shops and checking eBay and wanted to know a little more on exactly what I need when purchasing, besides the actual A16 back, I’m guessing I need a different focus glass with the lines for 645? Also a different prism to make it less awkward? Any info would be greatly appreciated.