https://emulsive.org/articles/5-frames-on-fujifilm-fujicolor-pro-400h-120-format-ei-400-pentax-645-smc-pentax-a-645-45mm-f-2-8-by-pete-crain
5 Frames... On Fujifilm Fujicolor Pro 400H (120 Format / EI 400 / Pentax 645 + SMC Pentax-a 645 45mm f/2.8)