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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 18 Jan 2011 (Tuesday) 14:21
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There is a black dot through the eyepiece!

 
dnguyen9
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Jan 18, 2011 14:21 |  #1

Need help here everyone please. I just bought a brand-new 24-70mm lens for my 5D and have been using it for less than 50 shots. Today I notice there is a black dot when I look through the eyepiece. Though it was from the front of the lens I looked but couldn't find any. Then I removed the lens and look through the eyepiece, I can see a lighter dot in the same position. Where does it come from, why it is light without the lens? and why it gets darker with the lens? By the way, the pictures do not seem to be affected by this dot at all.




  
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monst0r
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Jan 18, 2011 14:23 |  #2

It's either a piece of dust in the viewfinder itself, or the focusing aid boxes?


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fourelements99
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Jan 18, 2011 14:39 |  #3

Take the lens off the camera, use a blower to thoroughly blow any dust on the reflection mirror and the focus screen. Then clean both front and back elements of the lens.

If the black dot is still there, remove the focus screen and clean it up. Use the blower to remove any dust in the viewfinder compartment.




  
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Jim_T
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Jan 18, 2011 15:41 |  #4

You can't see normal dust that is on the lens elements or on the mirror.. If it's in reasonably sharp focus, then it's on the focus screen and nowhere else.




  
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robtaylor22
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Jan 18, 2011 15:44 |  #5

Sounds like dust in the viewfinder/focus screen, a very common problem with DSLRs. The screen can be taken out and cleaned. Take it to place that can clean your camera and they'll do it for a few bucks. Otherwise it shouldn't be affecting image quality.




  
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ranger50
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Jan 18, 2011 15:57 |  #6

I had the exact same thing. A tiny black dot when I looked thru the eye piece. I took off the lens and used some computer air and lightly blew it through out the interior screens. All gone, and good as new.


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pbelarge
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Jan 18, 2011 16:14 |  #7

ranger50 wrote in post #11667617 (external link)
I had the exact same thing. A tiny black dot when I looked thru the eye piece. I took off the lens and used some computer air and lightly blew it through out the interior screens. All gone, and good as new.



If you mean one of those cans of air, I strongly recommend not doing so.

As mentioned already, us a blower. Do not introduce any foreign stuff inside of your camera.


just a few of my thoughts...
Pierre

  
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dnguyen9
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Jan 20, 2011 00:19 |  #8

Thanks to all of you. I'll try the blower method and see if that helps or not. BTW, what blower type is recommended?




  
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Inspeqtor
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Jan 20, 2011 00:32 |  #9

dnguyen9 wrote in post #11676688 (external link)
Thanks to all of you. I'll try the blower method and see if that helps or not. BTW, what blower type is recommended?

I have the Giottos Rocket Air Blower (external link). I believe most people here have that one.
There is also a medium size blower (external link) available.


Charles
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There is a black dot through the eyepiece!
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