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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 _________________ 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. _________________ Konica 2,8/100
CZJ: 4/20, 2,4/35, 1,8/50 aus jena, 3,5/135MC, Pentacon 1,8/50
Pentax S-M-C-1,4/50
Helios 44-3
Mamiya 2,8/135
Misc. : jupiter 9
Stuff used:
A) SRL
Alpa 10 D - kern macro Switar 1,9/50 -black, Kilffit apochromat 2/100.
Asahi pentax spotmatic super takumar 1,4/50
Contaflex super B tessar 2,8/50 Pro-tessar 115
Leica R3 electronic summicron 2/50 elmarit 2,8/35
Konica Autoreflex 3 (2 black and chrome one), TC, T4. 2,8/24, 3,5/28 not MC and MC, 1,8/40, 1,4/50, 1,7/50 MC and not MC, 1,8/85, 3,2/135, 3,5/135, 4/200
Minolta XG9 2,8/35, 2/45, 3,5/135
Nikkormat FTn 1,4/50, 2,8/135
Fujica ST 801, 605, 705n. 3,5/19, 1,4/50, 1,8/55, 4/85, 3,5/135.
Praktica MTL 5 and a lot of M42 lenses.
Voigtlander. Bessamatic m, bessamatix de luxe, bessamatic cs, ultramatic and ultramatic cs.
Skoparex 3,5/35, skopagon 2/40, skopar 2,8/50, skopar X 2,8/50, super lanthar (out of catalogue) 2,8/50, dinarex 3,4/90, dinarex 4,8/100, super dinarex 4/135, super dinarex 4/200, zoomar 2,8/36-83, portrait lens 0, 1 and 2. Curtagon 4/28 and 2,8/35
Canon AV1, 1,8/50
Rolleiflex SL35 and SL35 E. 2,8/35 angulon, 2,8/35 distagon, 1,4/55 rolleinar, 1,8/50 planar, 4/135 tessar, 2,8/135 rolleinar, x2 rollei, M42 to rollei adap.
Etc.
RF
Yashica Minister III
Voightlander Vito, vitomatic I, Vito C, etc.
Leica M. M2, M3 (d.s.) and M4. Schenider 3,4/21, 2/35 summaron 2,8/35 (with eyes). Summicron 2/35 (8 elements with eyes), 2/35 chrome, 2/35 black, 1,4/35 pre asph and aspheric - old -, 2/40 summicron, 2,8/50 elmar, 2/50 7 elements, 2/50 DR, 2/50 - minolta version, 1,4/50 summilux 1966 version, 1,4/75 summilux, 2/90 large version, 2/90 reduced version of 1987, 2,8/90 elmarit large version, 4/135 elmar. |
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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. _________________ Regards,
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. _________________ -------------------------------
Items on sale on Ebay
Sony NEX-7 Carl Zeiss Planar 85mm f1.4, Minolta MD 35mm f1.8, Konica 135mm f2.5, Minolta MD 50mm f1.2, Minolta MD 250mm f5.6, Carl Zeiss Sonnar 180mm f2.8
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