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Ymmot
Joined: 24 Sep 2011
Posts: 168
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 Posted: Sat Sep 24, 2011 3:52 pm Post subject: Zuiko 50mm 1:1.4 haze or fungus? |
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Ymmot wrote:
A little while ago I bought a cheap zuiko 50mm 1:1.4 for 30 euro. I knew it would not be perfect, however it seems to have some more issues than anticipated.
The apperture is sticky, which is not a very big problem since it is used on digital.
However I noticed later that one of the internal elements is dirty (not counting dust and what seems as some flakes from the aperture?) and I can not really see what it is.
I personally think it is haze from grease that got in the lens, as the aperture is also sticky and judging from the other lens that the seller had, it had not been stored very well.
However I am not sure about this (limited experience) and thus I would like your judgement on what it is, since you probably have more experience in this matter than I do.
If it has fungus instead, I will probably sell it to a more adventurous person, as opening lenses is somewhat outside my comfort zone and I don't want it spreading to my other lenses/camera.
It takes nice photos though, the dirt is totally invisible straight on, only visible under a light source and off-axis.
Some photos showing the problem:
(I hope I included the images correctly, I know they will not show up as an anti spam measure)
Last edited by Ymmot on Sat Sep 24, 2011 4:15 pm; edited 1 time in total |
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poilu
Joined: 26 Aug 2007
Posts: 10472
Location: Greece
Expire: 2019-08-29
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| Posted: Sat Sep 24, 2011 3:59 pm Post subject: Re: Zuiko 50mm 1:1.4 haze or fungus? |
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poilu wrote:
welcome Ymmot
img doesn't show, try again
| Ymmot wrote: |
A little while ago I bought a cheap zuiko 50mm 1:1.4 for 30 euro. I knew it would not be perfect, however it seems to have some more issues than anticipated.
The apperture is sticky, which is not a very big problem since it is used on digital.
However I noticed later that one of the internal elements is dirty (not counting dust and what seems as some flakes from the aperture?) and I can not really see what it is.
I personally think it is haze from grease that got in the lens, as the aperture is also sticky and judging from the other lens that the seller had, it had not been stored very well.
However I am not sure about this (limited experience) and thus I would like your judgement on what it is, since you probably have more experience in this matter than I do.
If it has fungus instead, I will probably sell it to a more adventurous person, as opening lenses is somewhat outside my comfort zone and I don't want it spreading to my other lenses/camera.
It takes nice photos though, the dirt is totally invisible straight on, only visible under a light source and off-axis.
Some photos showing the problem:
<a><img></a>
<a><img></a>
(I hope I included the images correctly, I know they will not show up as an anti spam measure) |
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Ymmot
Joined: 24 Sep 2011
Posts: 168
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| Posted: Sat Sep 24, 2011 4:16 pm Post subject: |
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Ymmot wrote:
Thanks, hope this fixed the images. |
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Spotmatic
Joined: 18 Aug 2008
Posts: 4045
Location: Netherlands
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| Posted: Sat Sep 24, 2011 4:51 pm Post subject: |
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Spotmatic wrote:
Welcome to the forum! Poilu, you should know a new user's first post can never contain pictures. 
Based on my experience I'd say this is some sort of "moisture haze". So it should be cleanable. Opening lenses is not very hard but I'd suggest you to try worthless lenses* first.
(* isn't that blasphemy to say on a MFlenses forum?  )
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My fast 80s: Asahi-Kogaku Takumar 83mm f/1.9 - Super-Takumar 85mm f/1.9 - FA 77mm f/1.8 Limited - Cyclop 85/1.5 (Helios-40 innards) - Komura 80mm f/1.8 - Meyer Görlitz Primoplan 7,5cm 1:1.9 - Carl Zeiss Jena 80mm f/1.8 Pancolar - Canon 85mm f/1.8 S.S.C. - Canon 85mm f/1.2 S.S.C. Aspherical |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Sat Sep 24, 2011 6:39 pm Post subject: |
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Attila wrote:
| Quote: |
| Based on my experience I'd say this is some sort of "moisture haze". So it should be cleanable. |
+1 this is can be happen with anylens if lens cleaning fluid goes to inside of lens. It did happen with me too, when I did try to clean lens surface 'brain less ..' 
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Ymmot
Joined: 24 Sep 2011
Posts: 168
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| Posted: Sat Sep 24, 2011 7:01 pm Post subject: |
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Ymmot wrote:
Thanks, that is a relief. I haven't really got a 'worthless' lens (and the right tools for that matter).
The closest representative lens I have is a zuiko 50mm 1:1.8, which cost me about as much as this one, and was the first MF lens I bought, so that is not really an option.
If I ever get the tools I might try this, sadly I'm better at taking stuff apart than putting it back together...
(I believe olympus.dementia.org went offline, that had some wonderfull part diagrams and such for this kind of things  ) |
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berraneck
Joined: 24 May 2009
Posts: 972
Location: prague, czech republic
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| Posted: Sun Sep 25, 2011 9:09 am Post subject: |
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berraneck wrote:
| Ymmot wrote: |
| (I believe olympus.dementia.org went offline, that had some wonderfull part diagrams and such for this kind of things ) |
it has been moved under different domain, but it´s still on. silly I can´t find it now, I have it bookmarked on second PC..
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