New 12-100 but anomalies in front element

CyVan

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Hey guys, a friend of mine just got a new 12-100. Everything seemed fine:

1600574762965.png
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However when viewing it in the light from the side he saw this:

1600574848755.png
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1600581850537.png
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I'm not sure what it is. Some kind of fungus? But how would it get in there, its supposed to be weathersealed isn't it? or since it's not internal zooming there's still a chance. Does anyone else with a 12-100 see this?

So far whatever it is is outside the FoV @12mm but its disconcerting esp if it grows.
 

CyVan

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Hmm... I don't think it's fungus. More like a bad glue job. He should return or exchange it.
Hmm we did some googling and this was the closest match we found.
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What stands out to me are those vertical tendrils on his copy. They seem to match whats shown in the magnification above.
 

Mike Wingate

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It may be new, but has it been waiting, stored in a poor situation prior to shipping and sales. Send it back.
 

CyVan

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"sending it back" is a lot harder to do when you're in the middle of the caribbean sea, a thousand miles from the nearest service center :)

Took a very long time getting down here because of the pandemic hence why we were looking for confirmation of what it was. Even "free" warranty replacements cost us hundreds in USD in shipping charges. We're waiting for a response from Adoroma/Olympus
 
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PakkyT

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Maybe asking the obvious but since it wasn't mentioned yet, I assume you guys tried cleaning it to determine it is not on the front surface?

Also not likely "glue" since typically elements are not glued in but instead held in place by the front bezel. If you peeled off the front ring (usually sticky taped in place) you will likely find three screws holding down a bezel clamping the front lens in place. You can then remove the front element to try cleaning it, if you don't get satisfaction from Olympus that is.
 

Mack

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Here's the media for the fungus removable above for anyone interested. Comments are interesting.



Here's the cutaway of the 12-100mm f/4 Pro lens:
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Given elements 1 and 2 are likely glued, that pretty much means you need to replace that group for either fungus or bad cementing. If it's on the back of element 2 or front or back of element 3, you might access them from the front with some disassembly. You might have some luck in applying some of the cleaning methods in the video above.

However, I will say whenever I tried to get rid of fungus the thing never worked as well as prior if the fungus attacked the coating. The coating is part of the design for the RBG rays to converge on same spot and removing it causes some chroma errors and subsequent image softness. Might make for a good portrait lens though.

Personally, it's a lemon and I would ask for a replacement or refund. Buying the lens tool and dealing with a questionable outcome isn't worth it being new.
 

CyVan

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Maybe asking the obvious but since it wasn't mentioned yet, I assume you guys tried cleaning it to determine it is not on the front surface?

Also not likely "glue" since typically elements are not glued in but instead held in place by the front bezel. If you peeled off the front ring (usually sticky taped in place) you will likely find three screws holding down a bezel clamping the front lens in place. You can then remove the front element to try cleaning it, if you don't get satisfaction from Olympus that is.
yeah we checked , its not in the front.
 

phigmov

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Also not likely "glue" since typically elements are not glued in but instead held in place by the front bezel. If you peeled off the front ring (usually sticky taped in place) you will likely find three screws holding down a bezel clamping the front lens in place. You can then remove the front element to try cleaning it, if you don't get satisfaction from Olympus that is.
Oh, I wondered about that. Thanks for the explanation. As it was brand-spanking new I wondered if it could be delamination/seperation which seems to be more common in older lenses.

Exteme examples of this visible here http://www.4photos.de/camera-diy/Lens-Delamination-Separation.html
 
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Hey guys, a friend of mine just got a new 12-100. Everything seemed fine:

View attachment 848064

However when viewing it in the light from the side he saw this:

View attachment 848065

View attachment 848066

I'm not sure what it is. Some kind of fungus? But how would it get in there, its supposed to be weathersealed isn't it? or since it's not internal zooming there's still a chance. Does anyone else with a 12-100 see this?

So far whatever it is is outside the FoV @12mm but its disconcerting esp if it grows.
SEND IT BACK!
RETURN IT!
DO NOT ACCEPT IT!
IT'S DEFECTIVE!

Did I make myself clear? ... :rofl:
 
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CyVan

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Took some closeup shots of it with my O60. In the right light its It's actually beautiful.

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Still waiting to hear from Olympus.
 

MichailK

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this looks like such a deliberate and elaborate nature sabotage,
if it spreads this way much more this lens may well be auctioned as artwork in the future

however I think it is glue or failed coating application
 
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