Help! What seems to be dirt inside of lens? Deteriorated glass?

Discussion in 'Photography Equipment & Products' started by choubacca, Jun 27, 2008.

  1. choubacca

    choubacca TPF Noob!

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    hey guys,

    I just picked up this lens off of Ebay and when I received it it was in good working order and the lens looked flawless....until i put it on my camera. I immediatly noticed that when i looked through my viewfinder, it looked as though as the tint of what i am seeing is darker which looks very grainy almost as there is build up of dirt.

    Since Im not sure how dirt could get inside, could it be because the lens is maybe old so the glass on the lens has deteriorated? Will this affect my pictures? (its a film camera)

    Would a store like a Best Buy fix this? or is there a better store?

    thanks a whole bunch!!!

    chou
     
  2. DeadEye

    DeadEye TPF Supporters Supporting Member

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  3. choubacca

    choubacca TPF Noob!

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    no i dont think it is fungus, at least according to the picture. There is no build up inside of the lens i can see that looks like that
     
  4. Battou

    Battou No longer a newbie, moving up!

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    I get this periodiclly on my camera, some lenses just don't seem to interact with the focusing screen properly, the pictures should be fine if this is the case.
     
  5. choubacca

    choubacca TPF Noob!

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    hopefully you are right and the pictures won't be affected. But it is a slight annoyance to have look through a kind of garbled or marbled lens to shoot my picture. Is there a store that fixes or could look at it that anyone knows about?
     
  6. Battou

    Battou No longer a newbie, moving up!

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    I just got done taking some pictures of just what it is I think you are refering to, in a couple minuets I'll have them ready and posted.
     
  7. Battou

    Battou No longer a newbie, moving up!

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    Sorry for the bad shots and poor lens selection....sticking a P&S to the viewfinder is not easy.....and I don't bring everything I own to work. I'm going to try retaking these later, I kinda rushed threw it.


    But anywho Normal lens and focusing screen activity

    in focus
    [​IMG]

    Out of focus
    [​IMG]
    These where done with Canon FD 50 1.4

    but this is what I think you are experiencing

    In Focus
    [​IMG]

    [​IMG]

    Taken with Vivitar 400mm

    I believe my particular interaction is due to the limited amount of light threw the lens to the screen.
     
  8. choubacca

    choubacca TPF Noob!

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    Battou!! you hit it right on the head the last two images are EXACTLY what im experiencing!!!

    what do i do!? Even when i put it in focus its still heavily granulated. It would be so frustrating to have to look through that all the time



    thank you so much!
     
  9. Battou

    Battou No longer a newbie, moving up!

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    I have not yet found any course of action agenst it as of yet, I just take extra effort to keep it clean and shoot threw it.

    What is the focal leingth of the lens that you are using?
     
  10. choubacca

    choubacca TPF Noob!

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  11. Battou

    Battou No longer a newbie, moving up!

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    I was curious. I have a couple lenses that do it I just don't remember witch ones at the moment.

    This picture was shot threw the same lens used in the second two pictures.
     
  12. choubacca

    choubacca TPF Noob!

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    yeah, it doesnt seem that your picture was affected. I posted some pics above.
     

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