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Thread: see black spots

  1. #1

    Default see black spots

    hihi

    Today then realise 1 big black spot on the sensor ? i took out the lens.. lens dun haven. i look thru the viewfinder have.. I haven blowing and cleaning . cannot removed. when I took pictures.. there is no effect .

    Wat are they ? fungus ? Need to bring to canon service centre ? Still under warranty . is it covered ?

    thanks !

  2. #2

    Default Re: see black spots

    If it's only on the viewfinder, then you have dust on your focusing screen or stuck in the pentaprism/pentamirror assembly. If it's on the focusing screen, use a blower to blow it off. If it's in the mirror assembly, then you need to bring to a service centre. But realistically it won't affect your pictures, so unless it's really annoying you, just live with it
    Alpha

  3. #3

    Default Re: see black spots

    tried the blower as well.. i tink its on the top screen which may b mirror assembly?? coz it concides with the points on the screen...
    its covered in the warranty ?

    wonder how it gets in.. i din change my lens ...mm.. thanks so much !

  4. #4
    Senior Member ZerocoolAstra's Avatar
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    Default Re: see black spots

    Quote Originally Posted by droozy View Post
    tried the blower as well.. i tink its on the top screen which may b mirror assembly?? coz it concides with the points on the screen...
    its covered in the warranty ?

    wonder how it gets in.. i din change my lens ...mm.. thanks so much !
    Your lens isn't air-tight, so there is always a possibility for fine particles of dust, etc to land on the focusing screen or mirror. It is practically inevitable that something like that should happen. If it doesn't affect the image, I think you should try to live with it, rather than turn it into an obsession
    Exploring! :)

  5. #5
    Senior Member ZerocoolAstra's Avatar
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    Default Re: see black spots

    Quote Originally Posted by droozy View Post
    hihi

    Today then realise 1 big black spot on the sensor ? i took out the lens.. lens dun haven. i look thru the viewfinder have.. I haven blowing and cleaning . cannot removed. when I took pictures.. there is no effect .

    Wat are they ? fungus ? Need to bring to canon service centre ? Still under warranty . is it covered ?

    thanks !
    If you are using a DSLR (i.e. typical camera with changeable lens and mirror and optical viewfinder), dust on sensor will not show up when you look through the viewfinder. The sensor is hidden by the shutter mechanism.
    (see photo below for clearer explanation)

    http://3.bp.blogspot.com/_mMHvIAd8RH0/SP6SZ86PH3I/AAAAAAAAAn0/-0WxpdlJ9ZU/s400/Nikon_lightpath.jpg

    Similarly, dust on viewfinder, prism, mirror, or focusing screen will not show up in your captured image.
    Exploring! :)

  6. #6

    Default Re: see black spots

    haaa.. thanks bro for your explanation... but me abit obsessed.. abit irritated by the big spot.. but I guess..they can do it quite fast rt ?
    Actually I try blowers, lens pen, brush ... cant reach... errr cant removed eeeeee....lol
    How i wish i know how to reach it and do it myself..

  7. #7
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    Default Re: see black spots

    Erm, I once saw an explanation on how to clean the viewfinder... Unless you are really good, else, don't attempt it. There are some parts that cannot be touched carelessly or it will leave a permanent scratch worse than your black spot in viewfinder.
    Too many great equipments but too little quality photos. [My Flickr] | [My Blog]

  8. #8

    Default Re: see black spots

    its not viewfinder.. its rt inside the camera after I detached the lens...

  9. #9
    Senior Member ZerocoolAstra's Avatar
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    Default

    Quote Originally Posted by droozy
    its not viewfinder.. its rt inside the camera after I detached the lens...
    Should be on focusing screen?
    Am not sure what "right inside the camera" means
    Exploring! :)

  10. #10
    Moderator Octarine's Avatar
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    Default Re: see black spots

    Quote Originally Posted by droozy View Post
    its not viewfinder.. its rt inside the camera after I detached the lens...
    The next optical element after the lens would be the mirror. If you can't remove any dust / dirt with a blower better have it checked and cleaned in service center.
    EOS

  11. #11
    Moderator catchlights's Avatar
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    Default Re: see black spots

    the dust won't kill your camera,
    but the itchy fingers will.

    just learn to get used to it.
    Shoot to Live, Live to Shoot
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  12. #12

    Default Re: see black spots

    i tink its between the sensors and the shutters .. will bring down after wed ... thanks everyone !

  13. #13
    Moderator Octarine's Avatar
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    Default Re: see black spots

    Quote Originally Posted by droozy View Post
    i tink its between the sensors and the shutters .. will bring down after wed ... thanks everyone !
    Sensors? Shutters? Plural? While you have several AF sensors in your camera, there is only one image sensor.
    Between image sensor and shutter is the AA filter. Commonly, the filter is considered as part of the sensor. So where do you suspect the spots are? Did you even read all the above?
    EOS

  14. #14
    Senior Member edutilos-'s Avatar
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    Default Re: see black spots

    If you can't blow it out and it isn't too irritating I'd leave it alone. Otherwise, yes, bring it down to the servicing centre. Speaking from experience from fiddling with a few SLR focusing screen and scratching them badly in the process.

    Cheers.

  15. #15
    Senior Member rain5533's Avatar
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    Default

    Any sample photo output from this camera?

    If using F13 and appear that is dust stick on sensor.
    If shoot like normal and remain the red or black dot, is consider sensor issue.

    May need bring down to service centre for remapping the sensor.

    Thanks.

  16. #16
    Senior Member ZerocoolAstra's Avatar
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    Default Re: see black spots

    Quote Originally Posted by droozy View Post
    i tink its between the sensors and the shutters .. will bring down after wed ... thanks everyone !
    how did you deduce that?
    between the sensor and shutter... wow that's a small space
    Last edited by ZerocoolAstra; 30th July 2012 at 11:14 PM.
    Exploring! :)

  17. #17

    Default Re: see black spots

    Quote Originally Posted by catchlights View Post
    the dust won't kill your camera,
    but the itchy fingers will.

    just learn to get used to it.
    This is a good advice. If it doesn't affect the quality of the image, leave it alone. Don't fix an unbroken window.
    Nothing great in this world has ever been accomplished without passion
    ~ Hegel (1770 1831)

  18. #18

    Default Re: see black spots

    Quote Originally Posted by catchlights View Post
    the dust won't kill your camera,
    but the itchy fingers will.

    just learn to get used to it.
    Sadly I learn it the hard way... after taking out my focusing screen to clean, there are no dust left but scratches.. when NSC to change screen twice lol....
    Everybody is entitled to their own opinion, if you don't like mine pls ignore and move on.

  19. #19

    Default Re: see black spots

    There is this 1 time (Rare case) i tot i have dust at my focusing screen so i took out my screen to blow, only to see the 1mm sized dust is lodge inside the prism assembly... LL have to bring to NSC
    Everybody is entitled to their own opinion, if you don't like mine pls ignore and move on.

  20. #20

    Default Re: see black spots

    sent my camera over.. they can see some fungus but I cannot see ! anyway as mentioned they will also clean the away the dust inbetween the sensor.. but all not covered under warranty .
    May i know any other place can help to clean off fungus next time at a cheaper price and gd service ?

    Like wat all experts say here, cant prevent dust from going in..

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