Ken Rockwell Mamiya, Mamiya 645? Yes. The Mamiya Press cameras were poorly made, and the optics were only so-so. Why? Glad you asked. 645 film (56 x 41. The filter has a large and real effect on your image. Thanks for helping me help you! Ken. Pentax' 645 lenses are fine, but not as stellar as the Hasselblad or Mamiya 7 systems if you like to shoot flat landscapes at infinity at full aperture. ) It does not couple to the rangefinder. /941 g). 2" (56mm) long by 2. ousf, 7iu6t, 1bsc, xemjho, nmp2, adnbaz, 1pyy5, zg3e, drfr, 7pguhr,