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TP: How to identify fungus...?

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afidalgo View Drop Down
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Post Options Post Options   Quote afidalgo Quote  Post ReplyReply Direct Link To This Post Topic: TP: How to identify fungus...?
    Posted: 21 June 2007 at 18:40
Also read TP: How to protect Lenses from Fungus


Before anything, let me say that i did search the site for information on this.

I am aware of the general aspect of full grown fungus on a lens as i saw it once. However, i am beginning to have doubts if the dust on the inside of my beercan is dust or not.
It looks like dust...it is a lot of dust, but on my spring cleaning last week i looked harder and under better light and the "dust" seems "suspect". Some of it seems to be in orderly lines...

Can anybody direct me to pictures of fungus on lenses?

Or can you tell me the best way to take a picture of the inner element of a beercan with a 18-70 or 50/1,7 so i can post here. All pictures i took won't show it...



Edited by brettania - 27 November 2007 at 05:11
Sony A100, Sony 18-70 (kit), Minolta 70-210 f/3.5-4.5 Minolta 70-210 f/4 (in repair?), Minolta 50 f/1.7, 2Gb CF 133x, Lowepro Bag
 



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afidalgo View Drop Down
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Post Options Post Options   Quote afidalgo Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2007 at 19:30
Ok...the best i couldo do:
[/IMG]

Is it fungus? Or just an effect of the flash (you can always have hope...)?
Sony A100, Sony 18-70 (kit), Minolta 70-210 f/3.5-4.5 Minolta 70-210 f/4 (in repair?), Minolta 50 f/1.7, 2Gb CF 133x, Lowepro Bag
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Post Options Post Options   Quote nigelbrooks Quote  Post ReplyReply Direct Link To This Post Posted: 21 June 2007 at 23:08
Andre

It's difficult to tell, but the thread-like nature of the problem could indicate fungus.

As a precaution before you consider getting it cleaned, 'quarantine' your beercan from your camera and other lenses. If it's fungus it has a nasty habit of spreading.

Sadly, I don't know the camera market in Portugal else I would suggest a company who could inspect your lens. Perhaps the old KM centre in Bremen, Germany may be able to help.
Away until August 2014 at the earliest.
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afidalgo View Drop Down
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Post Options Post Options   Quote afidalgo Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2007 at 01:20
Ok...

A better "zoomed" view . . .

I thought that fungus would be black...can it be whitish?

[/IMG]

I guess i am only delaying the inevitable...tomorrow i will try to find a shop that can confirm the diagnosis... :(


Edited by afidalgo - 22 June 2007 at 01:21
Sony A100, Sony 18-70 (kit), Minolta 70-210 f/3.5-4.5 Minolta 70-210 f/4 (in repair?), Minolta 50 f/1.7, 2Gb CF 133x, Lowepro Bag
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Post Options Post Options   Quote stiuskr Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2007 at 04:19
I did a Google image search and found this linked to the photo.net forums.



Edited by stiuskr - 29 June 2007 at 00:26
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Post Options Post Options   Quote AlexKarasev Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2007 at 06:03
Sorry, this absolutely looks like fungus. I've bought two lenses on ebay with fungus (correctly advertised as such) for cheap and took them apart. this is how fungus looks.

Originally posted by afidalgo afidalgo wrote:

Ok...the best i couldo do:
[/IMG]

Is it fungus? Or just an effect of the flash (you can always have hope...)?
 



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afidalgo View Drop Down
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Post Options Post Options   Quote afidalgo Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2007 at 09:30
Originally posted by AlexKarasev AlexKarasev wrote:

Sorry, this absolutely looks like fungus. I've bought two lenses on ebay with fungus (correctly advertised as such) for cheap and took them apart. this is how fungus looks.

You took them apart for parts or did you actually repair them?
Sony A100, Sony 18-70 (kit), Minolta 70-210 f/3.5-4.5 Minolta 70-210 f/4 (in repair?), Minolta 50 f/1.7, 2Gb CF 133x, Lowepro Bag
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Bob J View Drop Down
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Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2007 at 09:53
I'd say fungus if it is on the outside of an element, or separation of elements if it appears to be between two cemented elements - you won't know until you have had the thing into as many bits as you can, so treat as fungus for the time being.

Bob
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Post Options Post Options   Quote CKsam2 Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2007 at 15:07
As said above, this is almost definitely fungus. If it's just on the rear of the front group, you may be able to clean it yourself by following Pete Ganzel's repair guide starting here. Otherwise, get someone else to clean it for you.

Best of luck.
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lauge View Drop Down
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Post Options Post Options   Quote lauge Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2007 at 15:36
I cleaned up a beercan with Hama lens cleaning kit and Pete Ganzel's repair guide. For me this was a fairly easy operation that took me about 1 hour and the result were obvious. It wasn't as much as in your case but the patterns were the same so I guess it's the same kind of fungus that will be easy to remove without traces. I recommend buying handling gloves to avoid leaving any traces on the inside of the lens.

Sony NEX-7 | Sony A55 | Dynax 5D | Dynax 7 | 7000AF | lots of Minolta and MF lenses
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Post Options Post Options   Quote afidalgo Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2007 at 17:47
Ok...UPDATE.

I went to a profissional. Is is officially fungus, not a serious case and i should have the lens back in a little more than a week (here i prefer to say "as long as it takes to be fine" as there is a national tendency to rush things...).

It should be around 30EUR...i don't know if this is too much or not, but it is way less than a new lens...

The technician claimed that, if nothing unusual appears inside, they should be able to clean all of it and the lens will be completly operational...

UUUUUffffff...that is a weight of my shoulders...or at least it will be in a couple weeks.

Thanks everybody for the inputs...will update when the lens gets back...
Sony A100, Sony 18-70 (kit), Minolta 70-210 f/3.5-4.5 Minolta 70-210 f/4 (in repair?), Minolta 50 f/1.7, 2Gb CF 133x, Lowepro Bag
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DaveK View Drop Down
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Post Options Post Options   Quote DaveK Quote  Post ReplyReply Direct Link To This Post Posted: 22 June 2007 at 18:29
30 Euro? Doesn't sound as much!

Good luck!

dave
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afidalgo View Drop Down
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Post Options Post Options   Quote afidalgo Quote  Post ReplyReply Direct Link To This Post Posted: 06 July 2007 at 18:51
Update...they couldn't clean the lens fully. They claimed that the interior element was inacessible...(the potuguese word was "cravado" which i don't know how to translate but i think means that it cannot be removed from the body).
I then went to another place, told the story, and they said that access is difficult but possible. The owner claimed to have good knowledge of minolta lenses due to past experience.
The bad news...they will charge 50 EUR due to the extra amout of work required...they said that the lens elements will be dipped in a special liquid, subjected to ultra-sounds and them reassembled...

I am hoping all this is true and efficient...next time i will only buy a lens from a trustworthy source...it is cheaper on the long run.

As a side note...they told me to subject the rest of my lenses to sunrays for 30min a day for at least a week...so that it kills any evetual contamination. AND the same for the bag (without the 30 min restriction).
Sony A100, Sony 18-70 (kit), Minolta 70-210 f/3.5-4.5 Minolta 70-210 f/4 (in repair?), Minolta 50 f/1.7, 2Gb CF 133x, Lowepro Bag
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Post Options Post Options   Quote royd63uk Quote  Post ReplyReply Direct Link To This Post Posted: 08 July 2007 at 18:46
Hi
I am no expert in lens cleaning and definately not fungus.But i recall reading somewhere that "microwaving" them will stop the fungus spreading if noticed soon enough,but wont remove what is there.
Roy
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