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  1. #1
    Join Date
    May 2005
    Posts
    6

    White Circle Appearing on Image

    Hi all. I just purchased the Canon SD850 IS camera for my wife and have taken maybe 50 pictures with it. She uses it as a point and shoot camera. On two photos I have come across a white circle on the images. According to Canon's website, this is a normal occurrence when the flash is used in a low light situation. Canon has an example posted.

    http://usa.canon.com/app/images/serv...hiteSPecks.jpg


    The spot on the right looks identical to the spot on my images. I am surprised that this is normal. (according to Canon's site) I have two Nikon digital cameras and never had anything like this. Can anybody confirm this known Canon flaw? Thanks in advance for your response.


    Regards,

    Tom

  2. #2
    Join Date
    Dec 2006
    Location
    So Calif
    Posts
    3,226
    That is not normal on any camera for any reason.
    Pentax K20D/K5/15/21/40/70/10-17/12-24, Sigma 17-70 2.8-4.5/150-500, Tamron 90 Macro/70-200 2.8, Canon SX20 IS/Elph 500HS
    (formerly Pentax 50 1.4/50-200/55-300/K100D, Sigma 18-50 2.8/70-300 APO, Tamron 28-75, Viv 800, Tele-Tokina 800, Canon S3 IS, Samsung L210)
    http://s133.photobucket.com/albums/q78/KylePix/

  3. #3
    Join Date
    Jul 2007
    Location
    Rockland County, NY
    Posts
    228
    It looks like flash ghosting to me. Check to see if there is dust on your lens.

    In simple terms what's happening is the bright flash of light from the flash is reflecting [refracting?] on the dust/imperfections on the lens and then sending that light onto the sensor, creating those hot spots.

    It happens with all cameras from time to time and is not a defect.
    -Drew

    The world gives me subjects, I just arrange them in a viewfinder.

    Nikon D80
    Sigma 17-70mm f/2.8-4.5
    Nikon 50mm f/1.8
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    New Gallery:
    http://drewsherlock.deviantart.com/



  4. #4
    Join Date
    Sep 2006
    Location
    Tokyo
    Posts
    291
    If you encounter the same spots (exactly the same size and location) on every picts, then it could be a lens dirt problem. Although those should actually be dark spots rather than white since the flash would probably create shadows rather than reflections.

    However, if it only appeared on this particular pict, I assume that it could be dust or particles floating around the room. You get a lot of this situations when doing flash photography on dusty areas like on the beach, or during snow rains, etc.
    Canon PS G9, PS G7, PS S3IS
    LENS: DCR-6600PRO, DCR-250, DCR-2020PRO, TC-DC58B, TC-DC58C, 500D macro 58
    FILTR: Canon UV 58mm, Raynox PL 52mm, Canon CPL 52mm, Hakuba S-Wide CPL 58mm
    FLASH: Canon 430EX, Canon OC-E3 cord, Sto-fen omni, Panasonic PE-28S

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  5. #5
    Join Date
    Jul 2005
    Posts
    41
    There was a long discussion about these white spots in some camera forum. I can't remember if it was this one or another one. The consensus was that these were dust refletctions when using a flash that is situated close to the lens. Unfortunately it is "normal" for some cameras. It only happens when using a flash right?
    I got the same type of spots when using my SD500 flash at a dusty campsite. All the other daytime shots from the trip were fine.
    Attached Images Attached Images  

  6. #6
    Join Date
    Dec 2006
    Location
    So Calif
    Posts
    3,226
    The outdoor camping shot is very much different that the linked picture in the OP. The camp shot is obviously dust (with many translucent reflections). The interior shot has essentially solid white dots - only 2 of them and much larger - which are not reflections of dust in the air, and I doubt from dust on the lens.
    Pentax K20D/K5/15/21/40/70/10-17/12-24, Sigma 17-70 2.8-4.5/150-500, Tamron 90 Macro/70-200 2.8, Canon SX20 IS/Elph 500HS
    (formerly Pentax 50 1.4/50-200/55-300/K100D, Sigma 18-50 2.8/70-300 APO, Tamron 28-75, Viv 800, Tele-Tokina 800, Canon S3 IS, Samsung L210)
    http://s133.photobucket.com/albums/q78/KylePix/

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