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BenediktW
Joined: 24 Jan 2008
Posts: 336
Location: Solingen, Germany
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 Posted: Sun Feb 14, 2010 2:44 pm Post subject: What is this? Fungus? |
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BenediktW wrote:
Hi everyone!
I´m looking for your advise. A lens I am considering to buy has "clear spots" on the inner lens at the rear end. A photo shows this:
What do you think is this? Fungus, dust or what else? Do you think this will harm image quality?
Thanks and regards
Benedikt
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http://www.1979fotographie.de/
Nikon D90, Sony NEX-3
AF-Nikkors 24mm F2,8, 35mm F1,8 DX, 85mm F1,8, 28-105mm F3,5-4,5D IF
Nikon MF: Nikkor 20mm F4, Nikkor 50mm F2 Ai, Micro-Nikkor-P 55mm F3,5, Nikkor 135mm F2,8 Ai, Nikkor 200mm F4
Carl Zeiss Sonnar 135mm F2,8 [for sale], Vario-Sonnar 80-200mm F4 T* (C/Y) with Leitax for Nikon-F
Minolta MD-Rokkors: 28mm F2,8, 45mm F2
M42 Lenses: Mamiya/Sekor SX 21mm F4, SX 28mm F2,8, SX 55mm F1,8, SX 135mm F2,8, 400mm F6,3 [for sale], Asahi-Pentax Super-Tak. 28mm F3,5 and 55mm F1,8, CZJ Tessar 50mm F2,8, Vivitar 135mm F2,8
Mamiya 645 Lenses: Mamiya Sekor C 80mm F2,8 N, 300mm F5,6, 105-210mm F4,5 ULD [for sale] |
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estudleon
Joined: 15 May 2008
Posts: 3754
Location: Argentina
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| Posted: Sun Feb 14, 2010 2:54 pm Post subject: |
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estudleon wrote:
I can't recognice fungus there.
But if you want to, see the lens with a lupe 10 or 30 x and see if the particles have, or not, the fungus estructure and form. Remember the tridimentionality of the spores, like a ball or an egg, not flatness.
Anyways, it seems to be an incipient problem, if it is one.
Rino.
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BenediktW
Joined: 24 Jan 2008
Posts: 336
Location: Solingen, Germany
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| Posted: Sun Feb 14, 2010 2:57 pm Post subject: |
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BenediktW wrote:
Hello Rino!
Thanks. This sounds reassuring, perhaps I´ll give it a try.
Sadly I cannot check the lens by myself, because it´s offered online. I took the picture from the seller. He doesn´t know what it is either.
Best regards
Benedikt
_________________
http://www.1979fotographie.de/
Nikon D90, Sony NEX-3
AF-Nikkors 24mm F2,8, 35mm F1,8 DX, 85mm F1,8, 28-105mm F3,5-4,5D IF
Nikon MF: Nikkor 20mm F4, Nikkor 50mm F2 Ai, Micro-Nikkor-P 55mm F3,5, Nikkor 135mm F2,8 Ai, Nikkor 200mm F4
Carl Zeiss Sonnar 135mm F2,8 [for sale], Vario-Sonnar 80-200mm F4 T* (C/Y) with Leitax for Nikon-F
Minolta MD-Rokkors: 28mm F2,8, 45mm F2
M42 Lenses: Mamiya/Sekor SX 21mm F4, SX 28mm F2,8, SX 55mm F1,8, SX 135mm F2,8, 400mm F6,3 [for sale], Asahi-Pentax Super-Tak. 28mm F3,5 and 55mm F1,8, CZJ Tessar 50mm F2,8, Vivitar 135mm F2,8
Mamiya 645 Lenses: Mamiya Sekor C 80mm F2,8 N, 300mm F5,6, 105-210mm F4,5 ULD [for sale] |
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woodrim
Joined: 14 Jan 2010
Posts: 4060
Location: Charleston
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| Posted: Sun Feb 14, 2010 2:59 pm Post subject: |
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woodrim wrote:
If you are speaking of the marks at 10 o'clock, they could be fungus, but the resolution isn't good enough for me to tell for sure. Fungus will look like a clear-ish spider web shape or what frost might look like on glass. If you plan on cleaning it or having it cleaned, it'll probably be okay. However, otherwise it could continue to spread. I can't say whether or not it will affect IQ.
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Woodrim |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Sun Feb 14, 2010 4:13 pm Post subject: |
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Attila wrote:
| woodrim wrote: |
| If you are speaking of the marks at 10 o'clock, they could be fungus, but the resolution isn't good enough for me to tell for sure. Fungus will look like a clear-ish spider web shape or what frost might look like on glass. If you plan on cleaning it or having it cleaned, it'll probably be okay. However, otherwise it could continue to spread. I can't say whether or not it will affect IQ. |
If there any fungus, in this quantity not impact anything. If you will store right (lower humidity than 60% ideally around 45%, without front cap , UV filter on to protect front lens from dust) 99% fungus will not grow at all.
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