Persistant dust on sensor

Discussion in 'Digital SLR' started by Paul Furman, Jan 22, 2006.

  1. Paul Furman

    Paul Furman Guest

    I've got a nast blob of 'dust' (more like a booger LOL) on my D70 sensor
    which multiple passes of pec pads & eclipse solution did not effect. I
    even kind of scrubbed on that area with extra fluid!

    Any other ideas for stubborn grime?
    Paul Furman, Jan 22, 2006
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  2. Paul Furman

    Robert Brace Guest

    Three fluids seem to work best (used separately, of course). Eclipse
    evaporates very quickly and seems to work best on easily removed foreign
    material. Sensor Clean fluid stays "wet" longer and seems to attack the more
    stubborn crap a bit better. Smear Away stays "wet" until you wipe it off,
    allowing it to more effectively clean the sensor.
    All of this depends upon using Sensor Swabs, not Pec Pads for cleaning the
    sensor surface.
    Robert Brace, Jan 22, 2006
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  3. Paul Furman

    Paul Furman Guest

    Thanks, yes I should have said I'm using Sensor Swabs with Eclipse, not
    Pec Pads.

    Seonsor Clean $36 Canadian
    -their link goes to a error page?
    "Put simply, there are situations where Sensor Clean will be required.
    Sensor Clean is a combination of non-scratching, medical-grade cleaning
    swabs (100 in all are included in each Sensor Clean kit) and a cleaning
    fluid that is less prone to streaking and easier to work with than
    either isopropyl alcohol [?] or methanol [Eclipse] based solutions.

    Degan hasn’t revealed exactly what’s in the magic cleaning elixir,
    except to say that it can be shipped internationally, contains no
    alcohol, isn’t flammable and is safe for use on the sensor’s cover glass
    (and lenses too)."

    Smear Away $27
    Paul Furman, Jan 22, 2006
  4. Paul Furman

    Gaderian Guest

    The pro's use methol hydrate (you can find it at your local pharamcy).
    Gaderian, Jan 22, 2006
  5. Since the solution you are using is pure methanol and if the spot is staying
    in the same spot I would be worried about something embedded in the surface
    of the sensor filter. One last hope would be if it were something that
    splashed on there wet. I would put a half drop of distilled water on your
    sensor swab since it doesn't evaporate as quickly as methanol and let it
    soak a few minutes. Follow with a swab wet with eclipse and you should be
    good. Good luck.

    Rita Ä Berkowitz, Jan 22, 2006
  6. Paul Furman

    C Wright Guest

    One source that I read about, when doing wet cleaning, uses 90% isopropyl
    alcohol or a 50/50 mixture of isopropyl alcohol and Windex. While I admit
    that I have never personally tried mixing in the Windex it makes some sense
    in that it would let the solution stay wet a little longer and allow for a
    little more scrubbing.
    C Wright, Jan 22, 2006
  7. Paul Furman

    Ron Guest

    Trade it in for an Olympus. No dust gives me plenty of time to think
    about noise...Sorry, couldn't resist. There are tradeoffs, but sensor
    dirt is something too many people learn about well after their

    There are some good ideas in this thread, but just be careful.
    Ron, Jan 23, 2006
  8. Paul Furman

    Celcius Guest

    One doesn't buy a camera to keep sensor dust away...
    The ides is to take good photos with good equipment. Sensor dust is
    accessory ;-)
    Celcius, Jan 23, 2006
  9. Paul Furman

    George TR Guest

    Some of the suggestions here advocate using extra fluid, or fluid that stays
    'wet' for longer. However, bear in mind that the greatest risk when
    cleaning a sensor lies in fluid penetrating behind the anti-aliasing filter
    (which is the surface that you're actually swabbing) and adversely affecting
    the sensor, itself.

    There have been previous posts about this issue - including one from a D70
    owner who found that the AA filter was not perfectly sealed on all sides,
    resulting in cleaning fluid seeping between the filter and sensor - with
    disastrous results.

    IMO, the golden rule of sensor swabbing is to keep the fluid used to a
    minimum (2 small drops, max) - and NEVER be tempted to 'flood' it with
    cleaning fluid in an attempt to disolve marks.

    'S up to you, of course.....
    George TR, Jan 23, 2006
  10. Paul Furman

    Paul Furman Guest

    Thanks Rita, what I finally did was use some walgreens isopropyl alcohol
    91% and that cleared the blob right off. Water might also have worked.
    Just something the mathanol/eclipse didn't dissolve, that is apparently
    the same thing as shellac thinner but not all solvents work on
    everything. Water is indeed a powerful solvent. Thanks also to who
    reminded that sopping wet could mean a tragedy if it seeped behind the
    glass cover into the sensor! Otherwise it's really not that big a deal
    cleaning the sensor.
    Paul Furman, Jan 29, 2006
  11. Paul Furman wrote:

    Great! I'm glad it was something simple. Also, if ever you have concerns
    about over saturating a cleaning swab you can put a couple drops of cleaning
    fluid on separate pad and then quickly touch your cleaning swab to that to
    transfer the proper level of moisture without worries of having too much.

    Rita Ä Berkowitz, Jan 29, 2006
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