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Thread: Help! Dots in photo

  1. #1

    Default Help! Dots in photo

    Hi all,

    Need some help with my photo below. My father took my cam for a tour and came back with photos that had dots in them (see below). After cleaning the lens (Nikkor 18-55mm kit lens) with a lenspen, I still saw the same dots after taking another photo. What could be the cause of these dots then? Do I need to take the lens to the service centre? Or is it not caused by the lens? Thanks for your help and advise in advance guys!

    Sorry for the large pic, wanted to show in detail...



    Nikon D40x / 18-55mm / 50mm f1.8 / 55-200mm VR / Tamron 17-50mm f2.8

  2. #2
    Senior Member sammy888's Avatar
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    Sep 2004
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    Singapore, Singapore, Singapor
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    1,568

    Default Re: Help! Dots in photo

    Quote Originally Posted by zambik View Post
    Hi all,

    Need some help with my photo below. My father took my cam for a tour and came back with photos that had dots in them (see below). After cleaning the lens (Nikkor 18-55mm kit lens) with a lenspen, I still saw the same dots after taking another photo. What could be the cause of these dots then? Do I need to take the lens to the service centre? Or is it not caused by the lens? Thanks for your help and advise in advance guys!

    Sorry for the large pic, wanted to show in detail...




    What you have is common with DSLR. Your sensor has gotten some specks of dust on it so whatever you shoot tend to have the same specks on them in the same places of each photo. This is not a problem with the lens. Some of us do the cleaning initially with a blower brush to see if we can blow the specks of dust away. Set the mirror to lock in the lock position so you can look right inside the camera (once you have taken the lens off the body) you should be able to see the sensor at the back of the camera's interior. The idea is to use the blower ( take off the brush tip) and then squeeze the rubber ball to jet air inside the compart towards the sensor but don't touch the sensor with the tip of the blower or your finger.

    This should dislodge dust that is not stuck to the sensor. You can check that by shooting a white plain wall and then look at the photo to try to spot if the dust is still there. Btw...set your f-stop to F8 to f16. This will sharpen the image so that it makes it easier to spot anything. Now if you have never done this before...well ...welcome to the club. We have to clean this every now and again. This is the most basic cleans you HAVE TO DO. No lens and camera in the world can avoid this.

    For specks that can't be blown away because some how it has sticky stuff that glue itself tightly to the surface of the sensor's coating. You will need a more direct way to clean it. This require special cleaning kit and some strong nerve and delicate fingers. This is done by some of us who don't mind the risk of scratching the sensor's glass coating. You have to be very careful if you want to do this yourself then to send it to Nikon Service Centre, pay money and let them do it. If you have no confidence, send it on and pay the expert to do this.

    The way to find out if your lens is dirty...just take about lens and shot a sample shot. If you still see the same specks in the same places...it is NOT your lens. The dust is in the sensor.

    I can go on but I think you get the general idea and you can google tp get a lot more information on this dust problem beside the TONS of writings on this issue in CS if beginners just take the time to do a search.


    http://www.clubsnap.com/forums/showthread.php?t=396889
    Last edited by sammy888; 27th July 2008 at 02:00 AM.

  3. #3

    Default Re: Help! Dots in photo

    Quote Originally Posted by sammy888 View Post
    What you have is common with DSLR. Your sensor has gotten some specks of dust on it so whatever you shoot tend to have the same specks on them in the same places of each photo. This is not a problem with the lens. Some of us do the cleaning initially with a blower brush to see if we can blow the specks of dust away. Set the mirror to lock in the lock position so you can look right inside the camera (once you have taken the lens off the body) you should be able to see the sensor at the back of the camera's interior. The idea is to use the blower ( take off the brush tip) and then squeeze the rubber ball to jet air inside the compart towards the sensor but don't touch the sensor with the tip of the blower or your finger.

    This should dislodge dust that is not stuck to the sensor. You can check that by shooting a white plain wall and then look at the photo to try to spot if the dust is still there. Btw...set your f-stop to F8 to f16. This will sharpen the image so that it makes it easier to spot anything. Now if you have never done this before...well ...welcome to the club. We have to clean this every now and again. This is the most basic cleans you HAVE TO DO. No lens and camera in the world can avoid this.

    For specks that can't be blown away because some how it has sticky stuff that glue itself tightly to the surface of the sensor's coating. You will need a more direct way to clean it. This require special cleaning kit and some strong nerve and delicate fingers. This is done by some of us who don't mind the risk of scratching the sensor's glass coating. You have to be very careful if you want to do this yourself then to send it to Nikon Service Centre, pay money and let them do it. If you have no confidence, send it on and pay the expert to do this.

    The way to find out if your lens is dirty...just take about lens and shot a sample shot. If you still see the same specks in the same places...it is NOT your lens. The dust is in the sensor.

    I can go on but I think you get the general idea and you can google tp get a lot more information on this dust problem beside the TONS of writings on this issue in CS if beginners just take the time to do a search.


    http://www.clubsnap.com/forums/showthread.php?t=396889
    Thanks sammy888 for your help! I will try the blower method 1st
    Nikon D40x / 18-55mm / 50mm f1.8 / 55-200mm VR / Tamron 17-50mm f2.8

  4. #4
    Senior Member
    Join Date
    Jul 2006
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    Clementi
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    Default Re: Help! Dots in photo

    sammy888 has pretty much covered all that needs to be said. I just might add that it would be nice if you didn't upload your pictures so large. It makes viewing the page a rather painful experience.

    Usually uploading pictures for web, you would resize them to about 600 - 800 pixels on the long side.

  5. #5

    Default Re: Help! Dots in photo

    Quote Originally Posted by calebk View Post
    sammy888 has pretty much covered all that needs to be said. I just might add that it would be nice if you didn't upload your pictures so large. It makes viewing the page a rather painful experience.

    Usually uploading pictures for web, you would resize them to about 600 - 800 pixels on the long side.
    My apologies... noted, will upload smaller pic next time
    Nikon D40x / 18-55mm / 50mm f1.8 / 55-200mm VR / Tamron 17-50mm f2.8

  6. #6

    Default Re: Help! Dots in photo

    Quote Originally Posted by zambik View Post
    Hi all,

    Need some help with my photo below. My father took my cam for a tour and came back with photos that had dots in them (see below). After cleaning the lens (Nikkor 18-55mm kit lens) with a lenspen, I still saw the same dots after taking another photo. What could be the cause of these dots then? Do I need to take the lens to the service centre? Or is it not caused by the lens? Thanks for your help and advise in advance guys!

    Sorry for the large pic, wanted to show in detail...
    It's sensor dust, not lens dust. Do your dust cleaning in an aircon room, better if can do in CLEAN ROOM, if not, you'll end up with more dust instead

  7. #7
    Member
    Join Date
    Jul 2004
    Location
    Singapore
    Posts
    487

    Default Re: Help! Dots in photo

    There's the temporary fix; if you're using Photoshop, try Spot Healing the offending defect.

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