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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 26 Feb 2018 (Monday) 11:28
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Is This Lens Fungus?

 
D. ­ Vance
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Feb 26, 2018 11:28 |  #1

Hi All,
I recently purchased a lens from eBay, and it got here today. I noticed some specs down inside the lens, and was wondering - is this lens fungus? And if it is, can it be spread to other lenses in my bag? :eek:
Thanks for your advice!


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I wonder if the video editors on The Titanic ever went, "Sorry, I can't right now. I'm busy synching the Titanic..."

  
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ebiggs
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Mar 02, 2018 08:49 |  #2

It could be. If it is it will spread inside that lens. Best bet is the send it to Canon for a C&C. Call support 1 (800) 652-2666
If it gets too bad it may not or even can't be fixed.


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gjl711
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Mar 02, 2018 09:33 |  #3

Hard to tell, could be but almost looks like water spots from hard water. Is it on the inside?


Not sure why, but call me JJ.
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gjl711
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Mar 02, 2018 09:33 |  #4

COuld also be dust. Pic a bit blurry.


Not sure why, but call me JJ.
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Patrick ­ H
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Mar 04, 2018 19:32 |  #5

looks like dust. Try stopping down and take another pic.


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txsizzler
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Mar 04, 2018 19:37 |  #6

Like others have said, its hard to tell... I am thinking either dust, maybe paint flaking (could be the inner shell spots we are seeing). Fungus usually looks more like a thick spider web, even in small spots, with thin, long arms that reach out from the main spot. I am not seeing that here, but the photo isn't very clear either.




  
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MalVeauX
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Mar 04, 2018 20:38 |  #7

Without a macro scaled image of the specs, we'll never know, because most of the "spots" are lost to out of focus area due choices made when choosing focal-ratio on this shot. Would have been easier to discern things at F8 here...

That said, we cannot tell. Like others mentioned. They're just spots at this scale. Maybe consider producing a more telling image of the problem?

Here's some out of control fungus:

IMAGE: https://farm3.staticflickr.com/2900/14231557877_ecccf0a754_b.jpg
IMAGE LINK: https://flic.kr/p/nFAs​kx  (external link) IMG_5474 (external link) by Martin Wise (external link), on Flickr

Very best,

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txsizzler
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Mar 05, 2018 06:22 |  #8

MalVeauX wrote in post #18577749 (external link)
Without a macro scaled image of the specs, we'll never know, because most of the "spots" are lost to out of focus area due choices made when choosing focal-ratio on this shot. Would have been easier to discern things at F8 here...

That said, we cannot tell. Like others mentioned. They're just spots at this scale. Maybe consider producing a more telling image of the problem?

Here's some out of control fungus:

QUOTED IMAGE
IMAGE LINK: https://flic.kr/p/nFAs​kx  (external link) IMG_5474 (external link) by Martin Wise (external link), on Flickr

Very best,

Yes, this is the "spider web" effect I am talking about, and how the long strands branch out. Not seeing that in the OP's photos, but then again their photos aren't very clear.

Great example of fungus though, MalVeauX!




  
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puttick
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Post edited 3 months ago by puttick.
     
Mar 07, 2018 05:48 |  #9

No, it's just dust. Don't worry about it, and you won't see it in any images. It can easily be cleaned if you ever have the lens serviced. Dust is generally only visible when its on the sensor, though a large piece of debris on the back element of a lens may show if stopped down to say f16.

If you're buying a lens that has some dust, it can be used to bargain the price down a little.


Nigel Puttick
North Yorkshire, UK

  
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D. ­ Vance
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Post edited 3 months ago by D. Vance.
     
Mar 07, 2018 06:11 |  #10

Thanks for the replies - I have been pretty busy, but I will try to get a better photo of it. Thanks for the information thus far! (And yes, the specs are on the inside.)


I wonder if the video editors on The Titanic ever went, "Sorry, I can't right now. I'm busy synching the Titanic..."

  
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Is This Lens Fungus?
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