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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 02 Jul 2012 (Monday) 14:20
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Lens Fungus.

 
c2thew
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Jul 04, 2012 03:15 |  #16

the branching pattern resembles fungus which is easily wiped off/cleaned.

etching the glass/optical coating takes a significant amount of time to see actual damage.


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Paintwerks
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Jul 04, 2012 03:19 |  #17

I don't know if it helps or not, but I keep a 100gm pouch of silica gel (colour changing) inside my camera bag at all times. Got the pouches from a UK seller on Ebay.


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Jul 04, 2012 03:19 |  #18

How does a image look made with a telephoto lens at f/22 or f/32?
If you don´t see the structurs there , it seems to be in the lens.
Are the structures still there with another lens, it seems to be a broken infrared cut/ AA filter assembly.


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c2thew
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Jul 04, 2012 11:29 |  #19

ZoneV wrote in post #14668528 (external link)
How does a image look made with a telephoto lens at f/22 or f/32?
If you don´t see the structurs there , it seems to be in the lens.
Are the structures still there with another lens, it seems to be a broken infrared cut/ AA filter assembly.

the op said that it's only on this lens and has tried using other lenses.


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amfoto1
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Jul 04, 2012 11:55 |  #20

Was that image made with the lens (presumably at f22) or was it made using another lens, through the 24-70?

If that image was made with the lens... it's almost certainly not fungus in the lens. It's on your sensor. There is no way it fungus or anything else inside the lens would show up so sharply at any f-stop.

You might not see it with other lenses, unless you really go looking for it. A more tele lens might not show it as clearly unless you can stop it down to f32 or f45.

I would recommend inspecting the sensor closely with a flashlight and magnifier.

You also might try the 24-70 on another camera... I'd be very surprised if you can still see that effect.

It does appear to be some form of fungus (which might just as happily grow inside a camera, as inside a lens).

Silica doesn't prevent fungus. It absorbs moisture... humidity in the air, reducing the chance of condensation. Not all fungus require moisture, but many thrive in it.


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DreDaze
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Jul 04, 2012 13:29 |  #21

how extreme of a crop is this?


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cannylad
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Jul 04, 2012 14:18 |  #22

Maximum crop on this lens only at F22, does not show on 70-200mm or 100-400mm, Paintwerks i will be getting silica gel packs for future use.

Again thanks for the responses all.


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stayhumble
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Jul 04, 2012 14:47 |  #23
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cannylad wrote in post #14668237 (external link)
Thanks Stayhumble, thats an interesting job you have, im going to visit a repair outfit soon to have an estimate, buts its interesting that some think it may not be fungal, it has grown slightly from my first noticed it, which led me to believe its not residue.

regards brian.

correct me if im wrong, but you guys don't have mold inspections in the UK, right? It's a legal and insurance thing here in the US tied with all home insurance.


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cannylad
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Jul 05, 2012 07:24 |  #24

stayhumble wrote in post #14670461 (external link)
correct me if im wrong, but you guys don't have mold inspections in the UK, right? It's a legal and insurance thing here in the US tied with all home insurance.


Never heard of one SH, update took it to a repair center, and it is fungus, so there going to try to clean it, just hope it hasnt etched any glass. I will let you all know the outcome.

Regards and thanks, brian.


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stayhumble
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Jul 05, 2012 15:47 |  #25
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on a side note, anyone find beauty in that image?

i see a reflection of a cloudy sky with the tops of a tree behind on top. it's definitely something i would hang up in my room. composition and everything, says a lot about this photo even though its not what it appears to be. thats art i guess.


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d123
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Jul 05, 2012 17:29 |  #26

cannylad wrote in post #14661298 (external link)
Has anyone encountered this before ? how did you deal with it,and was it expensive to treat ? Any info gratefully received.
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Might be worth speaking to Eddie Houston - www.thelensdoctor.co.u​k/ (external link)

He is an ex-Canon tech who is very reasonable for lens CLA and fungus cleaning.

Contact email is ehouston@talk21.com (external link)




  
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cannylad
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Jul 05, 2012 18:36 |  #27

d123 wrote in post #14675472 (external link)
Might be worth speaking to Eddie Houston - www.thelensdoctor.co.u​k/ (external link)

He is an ex-Canon tech who is very reasonable for lens CLA and fungus cleaning.

Contact email is houston@talk21.com (external link)

Thanks for that link Dave , interesting site and useful for future reference.


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d123
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Jul 06, 2012 08:37 |  #28

cannylad wrote in post #14675749 (external link)
Thanks for that link Dave , interesting site and useful for future reference.

No problem, as I said, I've used him in the past, and while he is based in Glasgow I had the lens back in 6 working days from sending off.




  
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