Minolta lens question

Discussion in 'Minolta' started by G.T., Sep 15, 2007.

  1. G.T.

    G.T. Guest

    After 4 years of non-use I'm resurrecting my Minolta Maxxum film SLR and
    noticed a difference between my Minolta lenses and my Canon lenses. When
    the Canons are off the body the aperture is wide open, but when the
    Minoltas are off the body they are totally stopped down. These are
    Minolta Maxxum autofocus lenses. I assume it's just a difference
    between the manufacturers since all 3 of my Minoltas are stopped down
    when off the camera. Or do all 3 of my lenses have stuck aperture blades?

    G.T., Sep 15, 2007
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  2. G.T.

    G.T. Guest

    Oh, yeah, since the viewfinder isn't dark I take it that it's not the
    latter, that the blades are in fact opening fine on the camera.

    G.T., Sep 15, 2007
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  3. G.T.

    Paul Furman Guest

    Could the difference be that the aperture rings are stopped down on the
    Minolta lenses? My Nikon lenses that have aperture rings are stopped
    down when dismounted and open when put on the body, the one's that lack
    an aperture ring are stopped down all the way when dismounted. All Canon
    EOS lenses lack an aperture ring, right?
    Paul Furman, Sep 15, 2007
  4. It is alleged that G.T. claimed:
    If I recall my old (really old, manual) Minolta lenses (which I no
    longer have), that is normal. The diaphragm is closed when "relaxed",
    the pin in the body side of the mount opens it up when the lens is

    Jeffrey Kaplan www.gordol.org
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    Jeffrey Kaplan, Sep 15, 2007
  5. G.T.

    Jeff Guest

    That is normal for Minolta lenses. They contact the tab in the body and
    open as the lens is twisted on.
    Jeff, Sep 15, 2007

  6. That's how they are made. It means the aperture return spring does not
    wear out or weaken when the lens is off the camera. If you plan to store
    a Minolta AF camera and lens for a few years, it's best to keep them
    separated not lens on body, for the same reason.

    David Kilpatrick, Sep 15, 2007
  7. G.T.

    Alan Browne Guest

    Minolta A-mount apertures are stopped down when off-camera. The back
    cap holds them wide open during storage, however.
    Alan Browne, Sep 15, 2007
  8. G.T.

    Alan Browne Guest

    .... except that the rear lens cap also hold the aperture open ...
    Alan Browne, Sep 15, 2007
  9. G.T.

    Siggy Guest

    Siggy, Sep 16, 2007
  10. I don't know why they did that. I usually just have the cap on the end
    of the lens but not bayonetted (some of them don't stay on anyway,
    especially the newer white type). The lenses all have their own cases.
    In the camera bag, I use the old black rear caps and they do stay put,
    and they open the aperture. But the lenses are getting swapped round and
    used. Sony has reintroduced the old Minolta black rear cap and scrapped
    the 'fall off every time' KM white one.

    David Kilpatrick, Sep 16, 2007
  11. G.T.

    Alan Browne Guest

    Most of my white ones work fine, but the one that came with the 80-200
    f/2.8 is definitely a loose cannon. I have a bit of orange paint on it
    as a warning. When I bought the 300 f/2.8, the fellow who owned it
    added a bit of masking tape over the edge to improve the stick. Black
    cap however... loose too.
    Alan Browne, Sep 16, 2007
  12. G.T.

    G.T. Guest

    There's no aperture ring on these, they're fairly modern cheap Maxxum AF

    G.T., Sep 17, 2007
  13. G.T.

    G.T. Guest

    Thanks Alan. I thought it felt like more was going on with the back cap
    than on my Canon lenses.

    G.T., Sep 17, 2007
  14. G.T.

    Alan Browne Guest

    The expensive Maxxum lenses don't have an aperture ring either. The
    entire A-mount (Maxxum/Dynax/Alpha AF) mount never had aperture rings.

    Alan Browne, Sep 18, 2007
  15. G.T.

    Alan Browne Guest

    My pleasure.
    On some lenses you can feel the pull back spring when putting on the cap
    .... an indication that the cap might be a bit too loose... (see David's
    lament in this thread).

    Alan Browne, Sep 18, 2007
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