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Thread: a small black dot in view finder

  1. #1

    Default a small black dot in view finder

    hi,my canon 7D i found a small black dot whn i view the viewfinder.
    i tried to swap wt another lens but the black dot stil ther.
    so wan to knw wat is the root cause?issit t he sensor dust or?
    but the photo i took don hv the black dot.how to remove tis black dot?
    anyone hv experience it b4?thanks

  2. #2
    Senior Member luckyorange's Avatar
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    Default Re: a small black dot in view finder

    Quote Originally Posted by paddy27 View Post
    hi,my canon 7D i found a small black dot whn i view the viewfinder.
    i tried to swap wt another lens but the black dot stil ther.
    so wan to knw wat is the root cause?issit t he sensor dust or?
    but the photo i took don hv the black dot.how to remove tis black dot?
    anyone hv experience it b4?thanks
    hi I believe it's dust inside the viewfinder.

    mine have it also (think 2 or 3) haha. but so long it doesnt affect the IQ it doesnt affect me =)
    Lousy de My Flickr

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  4. #4

    Default Re: a small black dot in view finder

    if u see black dot in optical viewfinder than should be the mirror got problem

    If black dot in photo means sensor problem. Use rocket blower or Google search how to clean mirror

  5. #5

    Default Re: a small black dot in view finder

    thanks a lot for the info. i think mine shld b dust in the viewfinder.will consider send to CSC to remove it.

  6. #6
    Senior Member rain5533's Avatar
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    Default

    Here got 2 solution of when clean on inside the viewfinder.

    1) can clean on mirror.

    2) is the grid transparent plastic has some mirror dust.

    Both can be used the rocker blower to blow some strong air to near the grid transparent plastic or mirror side.

    There is wont spoiled your sensor or get in dust to stick on sensor. Cause most of time the shuttle door is close.

  7. #7

    Default Re: a small black dot in view finder

    Quote Originally Posted by rain5533 View Post
    Here got 2 solution of when clean on inside the viewfinder.

    1) can clean on mirror.

    2) is the grid transparent plastic has some mirror dust.

    Both can be used the rocker blower to blow some strong air to near the grid transparent plastic or mirror side.

    There is wont spoiled your sensor or get in dust to stick on sensor. Cause most of time the shuttle door is close.
    thanks for ur info. but i don understabd wher is the grid transparent plastic?issit at the sensor ther?

  8. #8

    Default Re: a small black dot in view finder

    Quote Originally Posted by paddy27 View Post
    thanks for ur info. but i don understabd wher is the grid transparent plastic?issit at the sensor ther?
    No... It's at the top of the mirror box. It's also called a focusing screen.

    Look here:
    Canon EOS 5D with BG-E4 Battery Grip
    Alpha

  9. #9

    Default Re: a small black dot in view finder

    Quote Originally Posted by Johnbon View Post
    if u see black dot in optical viewfinder than should be the mirror got problem

    If black dot in photo means sensor problem. Use rocket blower or Google search how to clean mirror
    No, if you have a black dot in the viewfinder it's almost never the mirror, and the mirror "doesn't have problem". It's just dust in the OVF. Happens all the time.

    How will cleaning the mirror resolve dust on the sensor?

    Please read,research and understand before you try to give advice.
    Alpha

  10. #10
    Senior Member rain5533's Avatar
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    Default

    Quote Originally Posted by Rashkae

    No... It's at the top of the mirror box. It's also called a focusing screen.

    Look here:
    Canon EOS 5D with BG-E4 Battery Grip
    Thanks your photo

  11. #11

    Default Re: a small black dot in view finder

    Quote Originally Posted by paddy27 View Post
    thanks a lot for the info. i think mine shld b dust in the viewfinder.will consider send to CSC to remove it.
    why worry so much? even if you get it clean, the dust will still come back sometime later..

  12. #12

    Default

    I have 2 dots of dust and a tiny dead spider in my 5d mkii vf. No idea how a weathersealed body like that can be infested with tht kind of stuff

  13. #13
    Senior Member rain5533's Avatar
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    Default

    Quote Originally Posted by Prajna
    I have 2 dots of dust and a tiny dead spider in my 5d mkii vf. No idea how a weathersealed body like that can be infested with tht kind of stuff
    No matter how is does sealed, but when you unmount or mount others lens an the dusty can be easily go in and sticks on focusing screen.

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