What's the difference between Mamiya RZ and RB lenses?

Discussion in 'Medium Format Cameras and Accessories' started by Mainecoonmaniac, Apr 27, 2011.

  1. Mainecoonmaniac

    Mainecoonmaniac Subscriber

    Messages:
    3,997
    Joined:
    Dec 10, 2009
    Shooter:
    Multi Format
    I own an RZ system for over 20 years. A while back, I bought an RB lens to use with my RZ body. I have to admit that I screwed up a roll of film and I adjusted the shutter speed on dial on the body with my new RB lens. Oops! Other than the mechanical shutter in RB lenses are there differences between the lens systems? Are there differences is lens quality?:confused:
     
  2. TimmyMac

    TimmyMac Subscriber

    Messages:
    308
    Joined:
    Apr 12, 2010
    Location:
    Guelph, Onta
    Shooter:
    Medium Format
    Depends on the RB lens you're talking about.

    The newest RB K/L lenses are identical to the RZ lenses, except for the mechanical shutter in place of the electronic RZ ones.

    The older ones are older designs with older coatings, whatever difference those may make.
     
  3. polyglot

    polyglot Member

    Messages:
    3,472
    Joined:
    Jun 12, 2009
    Location:
    South Austra
    Shooter:
    Medium Format
    As TimmyMac says, the newest K/L lenses are equivalent to the first RZ lenses, but most of the RZ lenses have been refreshed since then. 110/2.8 and the 50/4.5 ULD are not available for RB because (I think) they have a too-large exit pupil. The film/flange distance is shorter for RZ than RB (less retrofocus required for wideangles), and the RZ camera throat is larger (larger exit pupils possible, e.g. for the ULD, 75-shift and 110).