Focussing issues with Olympus CAMEDIA C-470

Discussion in 'Olympus' started by Paul Ciszek, Jun 4, 2005.

  1. Paul Ciszek

    Paul Ciszek Guest

    I was able to get a Olympus C-740 at what seemed like a
    pretty good discount, because 3.2 megapixel cameras are
    now passe. I have been fooling around with it, and some
    of my pictures have been coming out much sharper and more
    detailed than I ever managed to get with 35mm film. (I
    am not a photographer, and my 35mm camera was never anything
    special.) So I know that the optics and the CCD are capable
    of good detail, but here is the problem:

    My landscape shots are never as sharp as my closeup
    shots. Stranger still, it seems that zoomed in shots (what
    I would call telephoto shots) are slightly less blurry than
    non-zoomed-in distance shots. When you are holding the camera
    by hand, telephoto should result in *more* blurring, not less,
    due to maginification of the effects of hand motion.
    The close-ups are extremely sharp, despite the camera
    being hand-held. I would think that hand motion would result
    in the same amount of blurring (measured as angular
    resolution) regardless of how near or far the object was,
    but I could be wrong about that.

    Anyway, anyone have any idea why the landscape shots are
    not as sharp as the closeups, and why the telephoto seems
    to help rather than hurt sharpness?

    I still think that I am getting better detail with the C-740
    than I used to with film, but it is frustrating to know that
    the camera *could* do even better.

    Oh, one thing I am grateful to Olympus for: The default state
    of the camera is to have so-called "digital zoom" turned *off*.
    (Playing with the 10x optical zoom has been fun.)
     
    Paul Ciszek, Jun 4, 2005
    #1
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  2. Paul Ciszek

    Ken Weitzel Guest


    Hi Paul...

    Dunno how much help it's going to be, but c-700 and c-720
    both do the same thing.

    I stand ready to be corrected, but I suspect that all cameras
    in this class do the same, and I'm leaning towards it being
    an unfortunate side effect of long glass.

    Take care.

    Ken
     
    Ken Weitzel, Jun 4, 2005
    #2
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  3. My guess is that the AF system is finding something in the foreground and
    focusing on it. The AF systems in most (all?) P&S dcams are horrendously
    bad. Not only are they glacially slow, but the area of sensitivity is much
    too large, and they reliably find something nice and contasty to focus on
    that isn't your intended subject.

    If the camera has a manual focus function, use that to set focus to infinity
    for your wide angle landscapey shots. Stop down to f/5.6 or f/8 and you
    should get great images.

    David J. Littleboy
    Tokyo, Japan
     
    David J. Littleboy, Jun 4, 2005
    #3
  4. Paul Ciszek

    Ken Weitzel Guest

    Hi David...

    The c-700 has manual focus; the c-720 lost it, so I'm not
    sure about Paul's 740.

    Regardless, we tried all kinds of tricks to get crisp
    landscapes with the 700 (playing with panorama's at the
    time) and nothing made them anywhere near as crisp
    as tighter shots.

    Take care.

    Ken
     
    Ken Weitzel, Jun 4, 2005
    #4
  5. That's too bad. I was able to get nice sharp images with both the Sony S85
    and F707, when I could persuade them not to misfocus.

    David J. Littleboy
    Tokyo, Japan
     
    David J. Littleboy, Jun 4, 2005
    #5
  6. Ken Weitzel wrote:
    []
    In which case, the camera is faulty (either by manufacture or design), and
    you should get a refund. [OK, a bit late now!]

    David
     
    David J Taylor, Jun 4, 2005
    #6
  7. Paul Ciszek

    Paul Ciszek Guest

    The so-called manual is rather skimpy. It mentions that there *is*
    manual focus, but doesn't say *how*. (I mean, there is nothing for
    me to twist, it's all motorized, there is a lever that lets me zoom
    in and out but nothing equivalent for focus.)
     
    Paul Ciszek, Jun 4, 2005
    #7
  8. Paul Ciszek

    Paul Ciszek Guest

    But "faulty" in a way that is still better than the results I was getting
    with my 35mm point-and-shoot. Oh, what a dilemma!
     
    Paul Ciszek, Jun 4, 2005
    #8
  9. Paul Ciszek

    Alex Butcher Guest

    If it's like my C-750, push and hold 'OK' (or the button in the middle
    of the cursor pad) for a bit and you should get a distance indicator on
    the left of the display, with AF selected. Select MF (by using the cursor
    pad) then use up and down to focus.

    The best thing to do is to print out the full manual on the CD (or the
    website) and use that.

    Best Regards,
    Alex.
     
    Alex Butcher, Jun 4, 2005
    #9
  10. Paul Ciszek

    Ken Weitzel Guest

    Hi Paul...

    Suspect that you might be just reading the paper that came
    with the camera? If so, there's a couple of huge pdf's
    available for you to download from Olympus. More than you
    ever wanted to know :)

    Anyway, to get into manual focus on the 700, you set up to
    take a pic in the p or p/a/s/m modes. (not auto, or any of the
    "icon" modes. Then press and hold the OK button for a few
    seconds.

    Take care.

    Ken
     
    Ken Weitzel, Jun 4, 2005
    #10
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