I notice there is not much discussion about the RF645. Its production run was not as long as the Mamiya RB, M6, M7 or Blad and many folks may not consider the camera when moving to MF. That's a shame. Does anyone know how many RF645s were produced. The second question is how many of the 100mm were sold. I have a complete 645 kit, 45/65/100. It's the best general purpose MF camera I have used.