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  1. #1
    Join Date
    Feb 2007
    Location
    New Jersey
    Posts
    78

    Dust on Mirror??

    Hi all,

    I know I should do more searches, but I'm pretty nervous and have to know this for sure..

    Went for the cherry blossoms on sat, and was switching lenses between my 50mm and 70-300, and I think I have dust on the mirror, but am not sure.

    When I look thru the viewfinder, there is a pretty large black spot on the top right. I tried taking pictures with a pale background, but the pictures turn out fine, no dust spots. Am I right to conclude that the dust is on the mirror??

    If so, can I use a brush on it, or a lens cloth,( I have these) or do i need to get a blower, as recommended in the manual?

    will post some pics soon.

    Thanks
    Nikon D80
    Nikkor 50mm f/1.8 D-AF
    Sigma 70-300mm f/4-5.6 APO DG Macro
    ML-L3, Hoya HMC UV (52mm), Sigma EX UV (58mm)

  2. #2
    Join Date
    Jul 2005
    Posts
    6,590
    You can't see dust on the mirror, since it is not in focus there. What you see is a spec of dirt on the focus screen, "above" the mirror. You can try to clean it with the soft brush.
    Last edited by coldrain; 04-02-2007 at 09:31 AM.
    Canon EOS 350D, Tamron SP AF 90mm F/2.8 macro, Sigma 18-50mm F2.8 DC EX, Canon EF 70-200mm f/4 L USM, Tokina AT-X124 Pro 12-24mm F4, Soligor 1.7x C/D4 DG Teleconvertor, Manfrotto 724B tripod, Canon Powershot S30

  3. #3
    Join Date
    Sep 2005
    Posts
    516
    Be VERY VERY careful here. You can easily clean the mirror but use a lint-free cloth to do it. The same stuff you use the clean lenses will work.

    DO NOT put a paper towel or something like that in there. This is cover your CCD with dust in a heartbeat.
    Small Town Newspaper Oaf

    East Coast Coorespondant for CRAWL Magazine!!??

  4. #4
    Join Date
    Jul 2005
    Posts
    6,590
    Quote Originally Posted by LR Max View Post
    Be VERY VERY careful here. You can easily clean the mirror but use a lint-free cloth to do it. The same stuff you use the clean lenses will work.

    DO NOT put a paper towel or something like that in there. This is cover your CCD with dust in a heartbeat.
    It is not the mirror that needs cleaning though. If you see spots in the view finder they are on the focus screen.
    Canon EOS 350D, Tamron SP AF 90mm F/2.8 macro, Sigma 18-50mm F2.8 DC EX, Canon EF 70-200mm f/4 L USM, Tokina AT-X124 Pro 12-24mm F4, Soligor 1.7x C/D4 DG Teleconvertor, Manfrotto 724B tripod, Canon Powershot S30

  5. #5
    Join Date
    Feb 2007
    Location
    New Jersey
    Posts
    78
    Thanks a lot for your pointers! Its clear now!!
    Nikon D80
    Nikkor 50mm f/1.8 D-AF
    Sigma 70-300mm f/4-5.6 APO DG Macro
    ML-L3, Hoya HMC UV (52mm), Sigma EX UV (58mm)

  6. #6
    Join Date
    Jun 2005
    Location
    Sydney, Australia
    Posts
    1,680
    Quote Originally Posted by coldrain View Post
    You can't see dust on the mirror, since it is not in focus there. What you see is a spec of dirt on the focus screen, "above" the mirror. You can try to clean it with the soft brush.
    Thankyou lightinsky for asking this question. I've had the same problem with my camera for several weeks. Tried cleaning all my lenses, the view finder, and the mirror....no success.

    Thankyou coldrain for the solution....tried your idea just now....yes, it was the screen above the mirror
    Canon 5D MKlll & Canon 50D
    Canon 70-200mm f/2.8L USM | Canon EF-S 17-55mm f/2.8 IS USM | Canon EF-S 10-22mm f/3.5-4.5 USM | Canon 100mm f/2.8 USM Macro | Canon 70-300mm f/4-5.6 IS USM | Canon 50mm f/1.8 | Sigma 17-70mm f/2.8-4.5 | Canon 430EX Flash | Lowepro Mini Trekker AW | Lowepro Toploader 65 AW | Lowepro Slingshot 200AW | Kata 3n1-10

    Panasonic Lumix FZ200
    Panasonic Lumix TZ7 (aka ZS3)
    Panasonic Lumix FT3 (aka TS3)

    Ali Baba.....the Thief of Bad Gags

  7. #7
    Join Date
    Mar 2006
    Location
    Brazil
    Posts
    53

    wow !!

    Guys, I've never noticed that

    My focus screen was dirty like hell -- thank you all
    J N PALMA
    Canon S2 IS - Raynox 6600 wide
    Nikon D50 - Sigma 17-70/Sigma70-300/Nikkor 50 1.8
    SB-600/bunchs of filters/extension tubes/gadgets

  8. #8
    Join Date
    Feb 2007
    Location
    New Jersey
    Posts
    78


    Guess its a pretty common problem... esp when you change lenses beside a busy street (like I did!!! lol!!)

    That said... next question is how do we actually know when to clean the sensor??!!
    Nikon D80
    Nikkor 50mm f/1.8 D-AF
    Sigma 70-300mm f/4-5.6 APO DG Macro
    ML-L3, Hoya HMC UV (52mm), Sigma EX UV (58mm)

  9. #9
    Join Date
    Mar 2006
    Location
    Brazil
    Posts
    53

    Cleaning the sensor

    Lightinsky,
    To know when to clean your sensor, read this:
    http://www.toledo-bend.us/index.shtml?sensor

    Then, read this website and navigate through the upper right links
    http://www.cleaningdigitalcameras.com/

    You could do a search here at dcresource and find thousands of discussions and methods about it.
    J N PALMA
    Canon S2 IS - Raynox 6600 wide
    Nikon D50 - Sigma 17-70/Sigma70-300/Nikkor 50 1.8
    SB-600/bunchs of filters/extension tubes/gadgets

  10. #10
    Join Date
    Feb 2007
    Location
    New Jersey
    Posts
    78
    Thanks jnpalma, The site was indeed informative...

    I think dive in more in detail when i really need to clean it.. in the meantime.. i still have lots of basic photography to read up... cheers
    Nikon D80
    Nikkor 50mm f/1.8 D-AF
    Sigma 70-300mm f/4-5.6 APO DG Macro
    ML-L3, Hoya HMC UV (52mm), Sigma EX UV (58mm)

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