Results 1 to 19 of 19

Thread: Problem with camera

  1. #1

    Default Problem with camera

    juz got a d50 recently and when i was taking pictures of the sky something wierd appear on the pictures




    as it can been seen in the picture, theres a curvy "w" shape on it whereas in the picture below, theres no sight of it.
    [EDIT]It seems like the "w" is more obvious with bigger aperture

    Last edited by exhys; 22nd April 2010 at 04:51 PM.

  2. #2

    Default Re: Problem with camera

    this is called dust

    it is on the camera sensor, and is common in dslr, because the lens can be changed meaning that the body is not sealed up (compared to P&S, the problem can happen in P&S but is not common), so when the sensor is on it generates static electricity which attacts dust to it.

    you see it in the earlier pictures probably because there is a LARGER F/STOP being used, which increases depth of field.

    in the later picture, obviously a SMALLER F/STOP is being used, so when the depth of field is shallow, your dust is OOF and becomes part of the lens blur area. and will not show up.

    to clean it, for such a large piece, go to sensor cleaning mode, place the blower if you have one slightly into the body (talking about tip here), aim at the sensor where the dust should be, and blow.

    please note that i am talking about a photographic blower, please do not use your mouth to blow or you will own your sensor.....

  3. #3

    Default Re: Problem with camera

    i hope you are acquainted with depth of field and aperture terms... if not don't know how else to explain already.

    you can google for these terms if you do not understand.

  4. #4
    Moderator catchlights's Avatar
    Join Date
    Sep 2004
    Location
    Punggol, Singapore
    Posts
    21,902

    Default Re: Problem with camera

    hair or fibre on sensor, read your camera manual for how to clear sensor.

    FYI, you are using f22 for distant shot, f5.6 for the phone close up shot, hence dust, dirt or hair on sensor will not show up
    Shoot to Live, Live to Shoot
    www.benjaminloo.com | iStock portfolio

  5. #5

    Default Re: Problem with camera

    time for spot healing i guess

    cheers
    to continue press hex key , to return to main menu press star

  6. #6

    Default Re: Problem with camera

    Thanks night86mare for the explanation. Will go and get 1 of those blower to clean the sensor.
    I think i have one lying around in my house. My dad uses it to blow off dust off his electronics and computer, wonder if i can use them
    Last edited by exhys; 22nd April 2010 at 04:58 PM.

  7. #7

    Default Re: Problem with camera

    Quote Originally Posted by exhys View Post
    Thanks night86mare for the explanation. Will go and get 1 of those blower to clean the sensor.
    I think i have one lying around in my house. My dad uses it to blow off dust off his electronics and computer, wonder if i can use them
    it should look something like this.



    be very careful when you are doing it. it is hard to make a serious error but you only need to touch the sensor with your blower hard enough while dreaming to create something which might be permanent. at the same time, don't be too scaredycat.

  8. #8
    Senior Member sinned79's Avatar
    Join Date
    Jun 2009
    Location
    Singapore
    Posts
    10,850

    Default Re: Problem with camera

    Quote Originally Posted by exhys View Post
    Thanks night86mare for the explanation. Will go and get 1 of those blower to clean the sensor.
    I think i have one lying around in my house. My dad uses it to blow off dust off his electronics and computer, wonder if i can use them
    i wun advise u to do that, u may get more dust if you dun know how to do it. Bring to the service center and get them clean for you for a fee.

  9. #9

    Default Re: Problem with camera

    Quote Originally Posted by night86mare View Post
    it should look something like this.



    be very careful when you are doing it. it is hard to make a serious error but you only need to touch the sensor with your blower hard enough while dreaming to create something which might be permanent. at the same time, don't be too scaredycat.
    does it have to have a metal tip? if i remember correctly, the 1 my dad has has a plastic tip instead. if not, any place to buy it?


    Quote Originally Posted by sinned79 View Post
    i wun advise u to do that, u may get more dust if you dun know how to do it. Bring to the service center and get them clean for you for a fee.
    thanks for the advice but gonna try night86mare method, on super tight budget after buying the camera.

  10. #10

    Default Re: Problem with camera

    no need to have metal tip.

    just blow it in a clean environment, it should do more good than bad.

    of course if you blow it next to aunt jemina's dusty cupboard then you are asking for it....

    this piece is quite large, do note that there might be smaller pieces that aren't as visible but are still there. some of these might be WELDED, ie. they hold moisture. the blowing method will not work for these and you will have to use wet cleaning of sorts, which is another animal altogether.

    to check properly for dust, find a white (relatively clean) wall, switch to av mode, dial in +1 ev, do f/22, and shoot for whatever period the camera suggests.

    then you can check immediately in-cam to look for small specks they should look relatively sharp at f/22.

    if you want greater visualisation you can upload to computer and raise the contrast, etc to see it more clearly.

  11. #11

    Default Re: Problem with camera

    av mode? how do i do that? using a nikon d50.

  12. #12

    Default Re: Problem with camera

    Quote Originally Posted by exhys View Post
    av mode? how do i do that? using a nikon d50.
    hrm.



    a that you see there.

    oh, and i forgot, switch to manual focus, and focus manually to the shortest distance that you can on whatever your lens, and make sure you're nowhere near that distance from the wall.

  13. #13

    Default Re: Problem with camera

    icic, the aperture priority. srry didnt know that is called the av mode.
    may i know what do you mean by "make sure you're nowhere near that distance from the wall"?
    Will try these when i get the blower. Thanks alot for the help

  14. #14
    Member leowyien's Avatar
    Join Date
    Jan 2010
    Location
    Serangoon
    Posts
    859

    Default Re: Problem with camera

    Quote Originally Posted by exhys View Post
    av mode? how do i do that? using a nikon d50.
    Guess you've juz started using a DSLR. Juz like studying, read more and you'll learn.

    Love yr phone btw.
    indie

  15. #15

    Default Re: Problem with camera

    Quote Originally Posted by exhys View Post
    icic, the aperture priority. srry didnt know that is called the av mode.
    may i know what do you mean by "make sure you're nowhere near that distance from the wall"?
    Will try these when i get the blower. Thanks alot for the help
    Quote Originally Posted by leowyien View Post
    Guess you've juz started using a DSLR. Juz like studying, read more and you'll learn.

    Love yr phone btw.
    I think its more of unfamiliar as using Nikon. Its known as "Av" for Canon users, for Nikon is "A".

  16. #16

    Default Re: Problem with camera

    Quote Originally Posted by exhys View Post
    icic, the aperture priority. srry didnt know that is called the av mode.
    may i know what do you mean by "make sure you're nowhere near that distance from the wall"?
    Will try these when i get the blower. Thanks alot for the help
    see ar, your lens should have focus scale

    so there is probably some scale in meter/feet, you can gauge using meter since you are more familiar with it being born in singapore.

    anyways, say, if the min focusing distance on the lens is 30 cm, then you should make sure you are either closer than 30 cm or further than 30 cm. do you get what i mean?

    btw, you don't need metal tip blower.

  17. #17

    Default Re: Problem with camera

    Quote Originally Posted by leowyien View Post
    Guess you've juz started using a DSLR. Juz like studying, read more and you'll learn.

    Love yr phone btw.
    yeah agree with that, trying to absorb as much as i can.

    and thx night86mare

  18. #18
    Senior Member sinned79's Avatar
    Join Date
    Jun 2009
    Location
    Singapore
    Posts
    10,850

    Default Re: Problem with camera

    Quote Originally Posted by exhys View Post




    thanks for the advice but gonna try night86mare method, on super tight budget after buying the camera.
    i dun know how much actually... but for canon its just $21.50

    for sensor i dun play play. cos if i scratch it, the cost can buy u a 1/2 or 3/4 new camera!

    i tried DIY myself once in the end more dust gets in, so in the end i still had to pay the service center a visit.

  19. #19

    Default Re: Problem with camera

    problem solved =)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •