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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 26 Apr 2015 (Sunday) 23:16
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Is this lens Fungus (Canon 80-200mm L)??

 
Ralph ­ III
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Post edited over 4 years ago by Ralph III. (2 edits in all)
     
Apr 26, 2015 23:16 |  #1

Hello All,
I just purchased a Canon 80-200mm L f2.8 (Magic Drainpipe) and need some input as to whether it has fungus or not. The original owner claims they only used it a few times and the lens does look Brand spanking new for that matter; however, upon close inspection there are many tiny spots within the lens.

One element (as pictured) has the spots all over it. They are all uniform in size and a significant amount. Then there is what appears to be a middle element that has the same type spots but they are only located in the center of the lens element, the outside edges are all clean unlike the one pictured. I cannot get pics of it but that is what raised a red flag for me because dust doesn't just migrate to one area and dust also varies greatly in size. Lastly, you can typically count the amount of dust specs within a lens and this is not the case with this lens.

I've never had a lens with fungus before but all the above would seem to be an indication of such. I would appreciate your input in confirming or denying this because it's a great lens. None of the specs degrade image quality that I can tell but I've only take a few images with it and do worry it could get worse...

Thanks,
Ralph



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MalVeauX
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Apr 27, 2015 00:10 |  #2

Heya,

Looks like delamintation to me.

Very best,


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juckerz
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Apr 27, 2015 00:57 |  #3

It's not fungus,, there's definitely a bit of haze going on as well.

Looks a bit like separation, but I don't believe there are any bonded elements in this lens.

Unless you got it for a steal, I'd send it back,,, not a difficult lens to replace.


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juckerz
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Apr 27, 2015 10:53 |  #4

Looks like the 13th element is bonded,,, so could be some separation going on ,, though it's the first time I've heard of that happening to this lens.

If you're keeping it, I'd consider having it professionally serviced/cleaned,, just in case it's something that's easily removed. Separation can be fixed,, but it's not cheap.


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Ralph ­ III
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Apr 27, 2015 16:48 |  #5

Thanks for the input. I've never heard of delamintation in a lens. My initial thought was fungus because the inner element has the same spots but they are located only in the middle of the lens. I assumed fungus started growing there and then began to spread out but having not covered that entire element....

Anyhow, I will be sending it back.

Take care,
Ralph


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Is this lens Fungus (Canon 80-200mm L)??
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