Pentax 645 lens to Pentax 35mm body

Discussion in 'Medium Format Cameras and Accessories' started by Feral Donkey, Aug 24, 2006.

  1. Feral Donkey

    Feral Donkey Member

    Messages:
    23
    Joined:
    Apr 4, 2006
    Location:
    Madison, WI
    Shooter:
    4x5 Format
    How well does the adapter ring work on the more modern slr bodies? I have a bunch of manual focus 645 lenses that I'd like to use if it's worth doing.

    Ok. I'll come clean. I bought a Pentax istDL digital slr for the business and I'd like to save some company money by not having to buy a new set of lenses for this camera. That's what I want to use these lenses on. I still only use film for my artwork. B&H says this about the lens mounting of this body.

    "PENTAX KAF mount compatible with PENTAX KAF2, KAF and KA mount lenses
    Power zoom function not available
    K-mount lenses usable with restrictions
    S-mount lenses usable with adapter and restrictions
    67/645 lenses usable with adapter and restrictions"

    What are the restrictions? I don't care if I have to use the camera manually just as long as it meters internally and runs the aperture blades when I shoot. Will the adapter ring allow me to get a ttl meter reading and run the blades?

    Any help will be greatly apreciated. If a moderator kills this thread because I used the "D" word, I'll understand.
     
  2. maxbloom

    maxbloom Member

    Messages:
    187
    Joined:
    Jun 25, 2006
    Shooter:
    Multi Format
    From an identical thread on "ThePhotoForum" :
     
  3. dunetraveller

    dunetraveller Member

    Messages:
    4
    Joined:
    Aug 25, 2006
    Location:
    Las Vegas, N
    Shooter:
    Medium Format
    If you use the Pentax K adapter, your lens' focal length will operate as the 35mm lens of the same numerical focal length (eg. Your 75mm standard lens for the 645 will be the equivalent of a 75mm lens on the 35mm camera body). Makes things awfully simple, doesn't it? Also means your "super-wide" 645 35mm lens is just a wide "normal" for 35mm work. This same holds true when using a 67 lens on a 645 using the 645 adapter.