Yet another sensor cleaning thread

Discussion in 'Digital SLR' started by Brian Gideon, Feb 4, 2006.

  1. Brian Gideon

    Brian Gideon Guest

    I'd like to update the group on my first experience using the "Copper
    Hill" method. I have owned a Canon 300D for about 1.5 years. I
    started noticing a couple of specs in f/11 and higher images recently
    so I decided it was time to clean the sensor.

    I took a test shot at f/22 of white wall and did an auto level
    adjustment in Photoshop to see how many pesky spots I had. I was quite
    surprised. There were too many to count, but I can say with some level
    of confidence that is was over 100. My first attempt with a Pec-Pad
    and Eclipse yielded great results. I counted about 30 spots. My
    second attempt took the number down to 10. The big offenders that
    showed up in f/11 are gone. At this point I was satisfied with the
    results and called it quits.

    The method was actually pretty easy. I was very careful not to
    contaminate the Pec-Pad. I found that if you lay one pad on your work
    area it can be used as a contanimate free place to rest an additional
    pad that will eventually go on the sensor swipe. Otherwise, it would
    have been difficult getting the pad on the sensor swipe without coming
    into contact with a contaminated object.

    Brian
     
    Brian Gideon, Feb 4, 2006
    #1
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  2. Brian Gideon

    Stacey Guest


    No it wasn't time to clean it, I'm the only person on this group who thinks
    dSLR sensors ever need to be cleaned or that dust can be a problem.
    Everyone knows sensor dust isn't something to be concerned with, except me?
     
    Stacey, Feb 4, 2006
    #2
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  3. SNIP
    I pull a PecPad out of the package, just holding it by the edge, and
    without laying it down I wrap it as suggested on the swipe. It's
    perfectly okay to touch the pad anywhere except for near the edge
    that'll get into contact with the sensor. Two drops of Eclipse and
    that's all, very fast.

    Bart
     
    Bart van der Wolf, Feb 4, 2006
    #3
  4. Brian Gideon

    JPS Guest

    In message <>,
    Nonsense. Most people hate sensor dust. We just don't think of it as
    the ultimate deal-breaker. You want us all to bow down before Olympus
    and worship their self-cleaning sensor; but I can't bow, because my
    Canon works better in low light, and a few dark spots are better than an
    image filled with darkness to maintain a useable shutter speed.
    Besides, I don't get any dark spots in low light, because the lens is
    open too much for it to happen. In fact, most situations in which dust
    is a problem are situations in which the small aperture was totally
    unnecessary. A more intelligent auto-exposure/ISO mode could avoid
    those pesky pinhole apertures. Most of my "speck" images occur when I
    am in Tv mode and/or high ISO because of low light, and suddenly have to
    shoot in bright light (like an unexpected raptor above a clearing in the
    woods).
    --
     
    JPS, Feb 4, 2006
    #4
  5. Brian Gideon

    Alan Bremner Guest

    Rubbish. Many, myself included, have experienced dirty sensors. You
    *are* the only person who treats it as A Big Thing, however.
    It's only "a problem" if you let it affect your images and/or your
    sanity. Most of us give a 10s blast with a Rocket or similar now and
    again and have few "problems".

    Brian has had his camera for 18 months and "the dust problem" was only
    noticed recently. Jeez, I had to clean crap out of my OMs more often
    than that!

    Al
     
    Alan Bremner, Feb 5, 2006
    #5
  6. Brian Gideon

    Brian Gideon Guest

    Exactly. There were only two big offenders at f/11 and they weren't in
    sharp focus so they were barely noticeable. I don't even have that
    many shots at f/11 anyway. And like you said I've had the camera for a
    long time. I'd hardly call it a problem. I would have been content
    letting it go longer, but I had heard cleaning is simple if done
    correctly so I decided to give it try. Also, notice how I didn't
    bother getting 100% removal. It just wasn't that important to me. I
    don't plan on cleaning it again anytime soon.
     
    Brian Gideon, Feb 6, 2006
    #6
  7. Brian Gideon

    Basic Wedge Guest

    Yes, wide open - all the way to f/5.6 :( Those awesomely fast Canon
    lenses! Or do you have one of their f/6.3 models? No wonder Canon puts so
    much value on ISO ratings. HaHaHa

    Rob
     
    Basic Wedge, Feb 6, 2006
    #7
  8. I agree. If it adds too much time in postprocessing, it's time for a
    cleaning session. I've only once 'had' to do a 'wet' cleaning session
    in several years, and it indeed also got rid of some of the spots that
    have been there since day one. I use VisibleDust brushes for regular
    cleaning, and I keep the brushes clean with alcohol and a PecPad.

    Since I rarely shoot at f/11 or smaller, the sky is one of the few
    areas that need checking for blobs. Photoshop CS2's Spot Healing brush
    tool works very fast there.

    Bart
     
    Bart van der Wolf, Feb 6, 2006
    #8
  9. Brian Gideon

    Sheldon Guest

    I've also reached a point where I can wrap a PecPad without putting the
    thing down, and the results, after some practice, are great. I can now get
    a sensor 100% clean on the first try. Often, using a blower just adds more
    spots, so I use the blower first to clean out the mirror and prism, and then
    attack the sensor with a swab after trying the blower.

    Never had much luck with those brushes. They just seem to move things
    around, and I have followed the directions.
     
    Sheldon, Jul 10, 2006
    #9
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