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Thread: HELP Needed PLEASE.... Curved shadow in middle of photo taken

  1. #1
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    Default HELP Needed PLEASE.... Curved shadow in middle of photo taken

    Dear All,

    I went to the AirShow and took some photos using my Canon 7D with Sigma 28-300mm lense but I get a light shadow in the middle of all the photos that I took. Could somebody enlighten me why such thing will happen please. When I switch over to Canon 10-22mm lense and the output is ok...

    Sample photos attached below...


    Somebody PLEASE HELP and enlighten PLEASE...

    Thank you very much in advance.

    Cheers!!!

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  2. #2
    Member Foxshade's Avatar
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    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    Looks like hair. Have you checked the lens or the camera sensor?
    A true photograph need not be explained, nor can it be contained in words.
    ~Ansel Adams

  3. #3

    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    Quote Originally Posted by Foxshade View Post
    Looks like hair. Have you checked the lens or the camera sensor?
    First you need a cheap LED torchlight with a single white light led with a yellow bottom not those
    useless white led arrays unless it is yellow at the bottom.A small one with AA battery is less than $5 at neighbourhood hardware shop. One magnifying glass.Shine through the lens and sensor.PS the leds with yellow bottoms are the ultra bright light output,
    very powerful.
    Last edited by one eye jack; 20th February 2014 at 12:32 PM.

  4. #4
    Moderator Octarine's Avatar
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    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    It's quite broad and blur, so I don't think that whatever it caused is sitting directly at the sensor. If changing the lens has solved it then check the rear element of the lens. Could be a hair or lint there.
    EOS

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    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    Thanks Guys for your advise, I will take a look at the lense and the camera sensor. I have a few lense and that only appear on my Sigma and another Samyang fish eye. If I use canon lense like 10-22mm or 18-135mm then that shadow I don't see it there....

    Very strange...

  6. #6
    Senior Member shierwin's Avatar
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    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    Quote Originally Posted by galaxynote View Post
    Thanks Guys for your advise, I will take a look at the lense and the camera sensor. I have a few lense and that only appear on my Sigma and another Samyang fish eye. If I use canon lense like 10-22mm or 18-135mm then that shadow I don't see it there....

    Very strange...
    Quite sure that come from the lenses. Give a good look at all your lenses and a good blow. Should clear all the artifacts!

  7. #7
    Moderator catchlights's Avatar
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    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    same "hair" can show up when using different lenses, that hair is in the camera is only answer.
    Shoot to Live, Live to Shoot
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  8. #8
    Moderator catchlights's Avatar
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    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    set your camera on aperture mode, using f22,
    open a note pad in your computer monitor, make it full screen,
    shoot the white monitor screen with all your camera lenses, fill the frame with the white screen.
    than load the all images into your image viewer programme and examine the images.

    you will know where is this "hair" come from.
    Shoot to Live, Live to Shoot
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  9. #9
    Senior Member shierwin's Avatar
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    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    The image captured by the sensor is upside-down and inverted to that seen on the LCD.
    If the artifact is seen in the top right quadrant of the LCD, it will be on the bottom left of the sensor.

  10. #10

    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    FOD. clean gear
    宁愿遇见丢失幼崽的母熊,也不愿碰上做蠢事的愚人

  11. #11
    Member mardellion's Avatar
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    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    Use a blower to blow your sensor upside down first.

  12. #12

    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    Quote Originally Posted by mardellion View Post
    Use a blower to blow your sensor upside down first.
    Most people don't know the proper method to clean. Blower bulb normally comes with a brush,
    use it to dislodge bigger and heavier dust particles but do it with camera upside down
    and poke from below gently without pumping so dust drop down due to gravity. After this remove brush and blow but of course this will only blow fine particles somewhere else so it's not a perfect solution.
    Last edited by one eye jack; 22nd February 2014 at 11:32 AM.

  13. #13

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    Quote Originally Posted by one eye jack View Post

    Most people don't know the proper method to clean. Blower bulb normally comes with a brush,
    use it to dislodge bigger and heavier dust particles but do it with camera upside down
    and poke from below gently without pumping so dust drop down due to gravity. After this remove brush and blow but of course this will only blow fine particles somewhere else so it's not a perfect solution.
    Sensor also use brush?
    hi

  14. #14

    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    Quote Originally Posted by silvermoon1407 View Post
    Sensor also use brush?
    No, try not to touch the sensor at all... a strong blast of air should be fine.

  15. #15
    Moderator catchlights's Avatar
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    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    Quote Originally Posted by silvermoon1407 View Post
    Sensor also use brush?
    you can't really touch the sensor, there is a piece of glass in front of the sensor, you can use brush or sensor swab to clean the sensor (the glass), but you need to know what are you doing and do it with care.
    Shoot to Live, Live to Shoot
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    Default Re: HELP Needed PLEASE.... Curved shadow in middle of photo taken

    Hi Guys,

    Last night I manage to figure out the problem. There's a mysterious hair or fur stuck right in front of the camera sensor. Managed to remove it and tested ok already....

    Thank you all for your advices...

    Cheers...

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