Pentax *ist DS Compatibility with Older Pentax Lenses

Discussion in 'Pentax' started by Larry R Harrison Jr, Dec 5, 2004.

  1. I was told by my mother that she is giving me some of her new husband's
    older Pentax 35mm equipment to me for Christmas. I do not know what the
    models are, whether it's something back in the ME Super/Super Program days
    or newer equipment. I just don't know.

    I am curious--what is the *ist DS's (and *ist D) compatibility with older
    Pentax lenses? I realize I don't know what year/designation these lenses
    are, but if anyone has a table of the types and how compatible they are with
    the *ist DS, that would help a lot.

    By compatibility, I mean--does it meter at all, meter but only in
    classic-center-weighted mode, or what exactly.

    If there is enough compatibility, I MIGHT consider an *ist DS when I get
    this equipment if it's nice and compatible enough. So I'm curious what the
    compatibility is with the different types (and model years).

    Larry R Harrison Jr, Dec 5, 2004
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  2. Larry R Harrison Jr

    Pete D Guest

    Generally they will work if they are electronically automatic. Just remember
    the x1.6 conversion factor. That aside suitable Sigma lenses are reasonabley
    priced anyway.

    I also have been looking at the *ist DS and they are very nice, I really
    like the slightly smaller size compared with the D70, 20D, etc.
    Pete D, Dec 5, 2004
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  3. Larry R Harrison Jr

    JohnR Guest

    Check here. Perhaps the best Pentax site around.

    AFAIK, you need at least A series lenses (introduced in the early 80's) for
    automatic exposure. The A series has a contact pin that allows the aperture
    to be read electronically from it. The previous M series lenses and older
    don't have the pin. These older lenses relied on a mechanical coupling to
    the camera to read the aperture. The digital SLRs don't have it as most
    (all?) of the newer film bodies as well.

    Of course the F series autofocus lenses and newer will provide the best
    compatibility (all metering modes and such)
    JohnR, Dec 5, 2004
  4. Larry R Harrison Jr

    Pete D Guest

    Personally I would not use the older lenses unless it was something like a
    fixed 400 or 500 like I had for my very old now KM that I bought new a long
    time ago.
    Are you sure, the DS uses a new CCD doesn't it, have to go and check now!
    Pete D, Dec 6, 2004
  5. Larry R Harrison Jr

    Pete D Guest

    I was really making the comment that a good camera like these should be used
    with lenses that will keep up with the high perferomance of the camera and I
    don't think the manual lenses do that.
    Yeah they are both 1.5 and they use the same CCD.
    Pete D, Dec 6, 2004
  6. Larry R Harrison Jr

    John Bean Guest

    That's a strange thing to say. Other than the obvious fact that there's no
    AF available to a manual lens, what other aspects of performance do you
    think it's likely to lack?
    John Bean, Dec 6, 2004
  7. Larry R Harrison Jr

    -T- Guest

    most of the Af lenses also got a very poor or no indication of hyperfocal
    distance, smth wich makes it more difficult to maz calculate dept of view
    -T-, Dec 9, 2004
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