Scary spots
  • 12_bolts
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    Scary spots

    by 12_bolts » Sun Jun 14, 2009 1:21 pm

    Getting what looks like a large piece of fluff on my photos.
    More visible at smaller apertures. Series of shots taken with various lenses. 8 of them are cropped in to show just the bottom right corner and 1 is the full size showing some other smaller spots through the middle as well.
    Taken on a Canon 350D. 7500 actuations, 3 years old.
    Image Image
    Sigma 10-20.............. ISO 100, f4.0, 1/1600 sec, 10mm............................................ISO 100, f22, 1/50 sec, 10mm

    Image Image
    Canon 35..................ISO 100, f2.5, 1/4000sec, 35mm..................................................ISO 100, f22, 1/40 sec, 35mm

    Image Image
    Canon 100 macro................ ISO 100, f2.8, 1/3200 sec, 100mm.................................................ISO 100, f22, 1/40, 100mm

    Image Image
    Canon 75-300................. ISO 100, f5.0, 1/800 sec, 200mm...................................................ISO 100, f40, 1/13 sec, 200mm

    Image
    Canon 75-300, ISO 100, f40, 1/13 sec, 200mm

    Is this just easily cleaned dust, which I haven't been able to do with a dust blower, or possibly something more serious.
    I live in North QLD so maybe fungus?
    TIA Phil
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    by echo » Sun Jun 14, 2009 1:37 pm

    The bottom right looks like fungus :(
    The rest more likely dust.
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    Bob G
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    by Bob G » Sun Jun 14, 2009 1:44 pm

    Just go over to Zoe Falls and give it a good wash. :lol:

    Seriously - looks like time for a sensor clean.
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    by avkomp » Sun Jun 14, 2009 2:38 pm

    a sensor clean may be on the cards

    but first I would blow out the mirror box area and sensor

    using a giotto rocket.

    the big one may be a lump of fluff floating around and you may be able to blow it away.
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    by 12_bolts » Fri Jun 26, 2009 9:34 am

    Update...
    Got the local pro to have a look at it for me.
    He has sucessfully cleaned off the large hairy looking lump and most of the other sensor dirt.
    Slapped me on the wrist for using a blower brush.
    $15 lighter and very happy with the result.
    Thanks every one for the input.
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    Dave_XTC
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    by Dave_XTC » Fri Jun 26, 2009 10:13 am

    Get rid of the lousy Canon and buy a Pentax K20d.
    Problem solved ! :D
    "Now that I have invented the roll film, it is now up to another to introduce the Pentax SLR camera to use it in. What a perfect combination that will be !!"...George Eastman (1888).
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    RichardW
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    by RichardW » Fri Jun 26, 2009 6:15 pm

    12_bolts wrote:Update...
    $15 lighter and very happy with the result.


    Thats pretty good Canon charge $50.
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    10fps
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    by 10fps » Fri Jun 26, 2009 9:10 pm

    12_bolts wrote:Update...
    Got the local pro to have a look at it for me.......

    Slapped me on the wrist for using a blower brush..........


    Please elaborate? I have heard blower brushes suck in dust when the fill back up with air & then blow it onto your sensor. Is that what he said?
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    Dalzine
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    by Dalzine » Sat Jun 27, 2009 8:59 am

    Personally I use a blower first, then a static brush and if necessary a wet clean. I haven't had to do a wet clean on my 50D yet, the blower and brush have been able to get it clean every time. Well ok, the one time I did a clean. :)

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    by 12_bolts » Sun Jul 05, 2009 4:47 am

    10fps wrote:Please elaborate? I have heard blower brushes suck in dust when the fill back up with air & then blow it onto your sensor. Is that what he said?


    He told me that the blower picks up all the dust that is within the camera and as well as blowing some of it out also distributes it on the sensor. Also there is a soft edge along the top of the housing that the mirror flips up on to and you dislodge bristles and captured dust from that as well.
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    by Oneputt » Sun Jul 05, 2009 9:38 am

    Whilst every now and then I get a professional clean, a blower not a blower brush, does an excellent job of keeping my sensor clean.
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    by Big Red » Sun Jul 05, 2009 12:43 pm

    I just use a Giotto rocket blower ... haven't needed a wet clean since 8)

    the Giotto sucks air from the rear and blows it out the front nozzle so your not sucking and blowing the dust out and in again.

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