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Thread: dust spot or not ?

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    Default dust spot or not ?

    I have a small dot on my image that appears when i set my aperture at the smallest(f22) but it disappear when i set it at the largest(f2.8). Is this a dust spot or something else ? It seems to be a problem with the body because i tried it with other lenses the spot still appear.

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    Senior Member luckyorange's Avatar
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    Quote Originally Posted by rachy588
    I have a small dot on my image that appears when i set my aperture at the smallest(f22) but it disappear when i set it at the largest(f2.8). Is this a dust spot or something else ? It seems to be a problem with the body because i tried it with other lenses the spot still appear.
    Think its dust on sensor, set to mirrior up mode, cam face down and use a blower to blow it off,

    Hope its not those stubborn dust.

    Please correct me if I'm wrong.
    Last edited by luckyorange; 4th January 2012 at 07:57 PM.
    Lousy de My Flickr

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    Quote Originally Posted by rachy588
    I have a small dot on my image that appears when i set my aperture at the smallest(f22) but it disappear when i set it at the largest(f2.8). Is this a dust spot or something else ? It seems to be a problem with the body because i tried it with other lenses the spot still appear.
    Post a picture. Or it's hard to tell.
    Equipment: D800|D700|11-16|28-75|105 Micro VR|50 F1.4G|85 F1.8G
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    Member Irvine's Avatar
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    Default Re: dust spot or not ?

    Quote Originally Posted by rachy588 View Post
    I have a small dot on my image that appears when i set my aperture at the smallest(f22) but it disappear when i set it at the largest(f2.8). Is this a dust spot or something else ? It seems to be a problem with the body because i tried it with other lenses the spot still appear.
    Based on your description, it's most likely to be a dust spot.

    Please provide a picture showing the spot for better illustration so that others can give you appropriate advice.
    Google is your friend. Make use of it.

  5. #5

    Default Re: dust spot or not ?

    This is taken with a tokina 11-16 at 16mm f22


    Taken with Nikon 50mm 1.8 at f22




    Taken with Tokina 11-16 at f22




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    Moderator rhino123's Avatar
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    Default Re: dust spot or not ?

    Quote Originally Posted by rachy588 View Post
    This is taken with a tokina 11-16 at 16mm f22
    Yep. Look like dust spot or a stain.

    Time to clean up your sensor.
    I am not a photographer, just someone who happened to have a couple of cameras.
    My lousy shots

  7. #7

    Default Re: dust spot or not ?

    can i clean it myself or do i need to send it for servicing ?

  8. #8

    Default

    Quote Originally Posted by rachy588
    can i clean it myself or do i need to send it for servicing ?
    You can either do it yourself, just get sensor swabs and cleaning solution or send it to the service center.

  9. #9

    Default Re: dust spot or not ?

    many thanks pple! so its dust on the sensor right ?

  10. #10

    Default Re: dust spot or not ?

    yes. at wider apertures you won't see the dust appearing in your images. but when you have smaller apertures, the dust will appear and become more obvious.

    so to check whether your sensor has dust on it, just close it up to something smaller like F16 and those spots will be more obvious.

  11. #11
    Moderator rhino123's Avatar
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    Default Re: dust spot or not ?

    Quote Originally Posted by rachy588 View Post
    many thanks pple! so its dust on the sensor right ?
    Yep looks like it... anyway cleaning your sensor is very simple.


    First remove your lens, give the camera a few good blow of the rocket blower with the camera facing down. Then assess your sensor (there should be a command in your menu), and give it a few good blow of the rocket blower, with camera facing down.

    Then test, mount your camera to a tripod, set to a small aperture (F16 and above), face a white surface... and shoot.

    If you still find the spots, then use a sensor swab (coupled with sensor cleaning fluid), these can be bought from Cathay Photo (I think other camera shop also have). Then follow to instruction on the sensor swab box and clean... should be able to remove most stain, dirt and stuff like that. But before you use the sensor swab, be sure to give your camera one more blow to ensure that there are no hard particles are not on the sensor anymore.
    I am not a photographer, just someone who happened to have a couple of cameras.
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    Deregistered allenleonhart's Avatar
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    Default Re: dust spot or not ?

    easiest way to test sensor dust, take off lens and take 1 photo on a white bg. still see the dot there? sensor dust.

    normally a few blows with a blower should do it

  13. #13

    Default Re: dust spot or not ?

    er wait. it looks more like dust on lens than sensor.

  14. #14

    Default Re: dust spot or not ?

    tried shooting with a white background but my camera cant seems to shoot. if just kept focusing.

  15. #15

    Default Re: dust spot or not ?

    Quote Originally Posted by rachy588 View Post
    tried shooting with a white background but my camera cant seems to shoot. if just kept focusing.
    Switch to manual focus

  16. #16

    Default Re: dust spot or not ?

    what type of cleaning solution can we use?

  17. #17
    Senior Member edutilos-'s Avatar
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    Default Re: dust spot or not ?

    Quote Originally Posted by IsenGrim View Post
    er wait. it looks more like dust on lens than sensor.
    What's the difference in pictures?

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    Moderator daredevil123's Avatar
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    Default Re: dust spot or not ?

    Er how come the spot moves around?

    If you zoom your lenses and take shots are different focal lengths, and the spot moves, then the dust is not on the sensor.

    For dust spots to appear clearly on lens, it is resting on an element that very close to the aperture opening.

  20. #20

    Default Re: dust spot or not ?

    it's a bird.


    bound to have dust la, even if you clean now it'll come back in another place.

    Just learn to use the clone tool.

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