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a20010494
Joined: 15 Feb 2010
Posts: 396
Location: Perú.
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 Posted: Tue Mar 16, 2010 10:34 am Post subject: It's all over... |
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a20010494 wrote:
My biggest lens is sick... and i feel sad for it. Today, i discovered 2 small fungus blotches on internal elements from my Sigma 70-200 f2.8 EX II, its the good ribbed version (which is better than the newer versions). I heard that exposing it to UV rays will kill the fungus? Or i have to open it?
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indianadinos
Joined: 06 Jul 2008
Posts: 1310
Location: Toulouse, France
Expire: 2011-12-05
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| Posted: Tue Mar 16, 2010 7:24 pm Post subject: |
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indianadinos wrote:
Hello,
Yes, exposing it to UV (whether from sunlight or from a lamp) will kill it ...
Just don't forget to remove the UV filter from the lens (if you use one), as i did with one of mines  ...
Cheers
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Please visit my blogs Shooting with a Pentax K10D / FF Visions
Takumar: 24/3.5, 28/3.5, 35/2, 35/3.5, 50/1.4, 55/1.8, 85/1.8, 105/2.8, 120/2.8, 135/3.5, 150/4, 200/4
Pentax-K: M28/2.8, K28/3.5, M50/1.4, A50/1.7, M50/4 Macro, K85/1.8, K105/2.8, K135/2.5, M200/4, M70-150/4
Zeiss: Flektogon 20/2.8, 20/4, 35/2.4, 35/2.8, Tessar 50/2.8, Pancolar 50/1.8, Biotar 58/2, Sonnar 135/3.5, Sonnar 180/2.8
Meyer: Primagon 35/4.5, Domiplan 50/2.8, Oreston 50/1.8, Primoplan 58/1.9, Trioplan 100/2.8, Orestor 100/2.8, Orestor 135/2.8
Schacht/Steinheil: Travenar 90/2.8, Travenon 135/4.5, Quinar 135/2.8, Quinar 135/3.5
Russian: MIR 37B, Industar 50/3.5, Helios 44M & 44M-2, Jupiter 37A
P6: Flektogon 50/4, Biometar 80/2.8, Orestor 300/4
Nikkor: Nikkor-O 35/2, Micro 55/3.5, Nikkor-S 50/1.4, Nikkor-Q 135/2.8
Fuji: EBC 28/3.5, EBC 55/3.5 Macro, EBC 135/2.5
Misc Lenses: Kiron 105/2.8 Macro, Tamron SP90/2.5
... and a few other Vivitar, Tamron, Sigma and Soligor lenses ...
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visualopsins
Joined: 05 Mar 2009
Posts: 10530
Location: California
Expire: 2025-04-11
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| Posted: Tue Mar 16, 2010 7:42 pm Post subject: |
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visualopsins wrote:
careful under tropical sun too much heat will melt helicoid grease travel to iris and elements.
if small fungus spots no effect in photographs, suggest put into dry cabinet for a week or two to force fungus into hibernate, from then watch for fungus it should not grow. store in dry cabinet; example: airtight waterproof Pelican case and fresh dry silica gel inside.
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Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (51BB), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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peterqd
Joined: 28 Feb 2007
Posts: 7448
Location: near High Wycombe, UK
Expire: 2014-01-04
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| Posted: Tue Mar 16, 2010 9:48 pm Post subject: |
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peterqd wrote:
| indianadinos wrote: |
Hello,
Yes, exposing it to UV (whether from sunlight or from a lamp) will kill it ...
Just don't forget to remove the UV filter from the lens (if you use one), as i did with one of mines ...
Cheers |
UV may kill it, but it doesn't remove it I think Dino.
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indianadinos
Joined: 06 Jul 2008
Posts: 1310
Location: Toulouse, France
Expire: 2011-12-05
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| Posted: Tue Mar 16, 2010 10:35 pm Post subject: |
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indianadinos wrote:
Hi Peter,
No, it will not remove it, just kill, but, if it is a "young" spot, maybe it will not affect IQ ...
_________________
Please visit my blogs Shooting with a Pentax K10D / FF Visions
Takumar: 24/3.5, 28/3.5, 35/2, 35/3.5, 50/1.4, 55/1.8, 85/1.8, 105/2.8, 120/2.8, 135/3.5, 150/4, 200/4
Pentax-K: M28/2.8, K28/3.5, M50/1.4, A50/1.7, M50/4 Macro, K85/1.8, K105/2.8, K135/2.5, M200/4, M70-150/4
Zeiss: Flektogon 20/2.8, 20/4, 35/2.4, 35/2.8, Tessar 50/2.8, Pancolar 50/1.8, Biotar 58/2, Sonnar 135/3.5, Sonnar 180/2.8
Meyer: Primagon 35/4.5, Domiplan 50/2.8, Oreston 50/1.8, Primoplan 58/1.9, Trioplan 100/2.8, Orestor 100/2.8, Orestor 135/2.8
Schacht/Steinheil: Travenar 90/2.8, Travenon 135/4.5, Quinar 135/2.8, Quinar 135/3.5
Russian: MIR 37B, Industar 50/3.5, Helios 44M & 44M-2, Jupiter 37A
P6: Flektogon 50/4, Biometar 80/2.8, Orestor 300/4
Nikkor: Nikkor-O 35/2, Micro 55/3.5, Nikkor-S 50/1.4, Nikkor-Q 135/2.8
Fuji: EBC 28/3.5, EBC 55/3.5 Macro, EBC 135/2.5
Misc Lenses: Kiron 105/2.8 Macro, Tamron SP90/2.5
... and a few other Vivitar, Tamron, Sigma and Soligor lenses ...
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a20010494
Joined: 15 Feb 2010
Posts: 396
Location: Perú.
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| Posted: Wed Mar 17, 2010 1:17 am Post subject: |
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a20010494 wrote:
i hate all fungus now.
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hk300
Joined: 30 Oct 2008
Posts: 1041
Location: Hong Kong
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| Posted: Wed Mar 17, 2010 3:07 am Post subject: |
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hk300 wrote:
| indianadinos wrote: |
Hello,
Yes, exposing it to UV (whether from sunlight or from a lamp) will kill it ...
Just don't forget to remove the UV filter from the lens (if you use one), as i did with one of mines ...
Cheers |
Dino .. i think exposing it too sunlight will only prevent the fungus from spreading out, it will likely NOT kill the fungus.
Also be careful, too much sunlight will create heat and probably some internal parts may melt / go bad.
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No longer member , please don't try to contact to him |
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hk300
Joined: 30 Oct 2008
Posts: 1041
Location: Hong Kong
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| Posted: Wed Mar 17, 2010 3:13 am Post subject: Re: It's all over... |
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hk300 wrote:
| a20010494 wrote: |
| My biggest lens is sick... and i feel sad for it. Today, i discovered 2 small fungus blotches on internal elements from my Sigma 70-200 f2.8 EX II, its the good ribbed version (which is better than the newer versions). I heard that exposing it to UV rays will kill the fungus? Or i have to open it? |
use it, expecially outdoors in the sun, it will likely slow down or even stop the fungus from spreading out.
when you don't use it, use a dry cabinet to store it.
Sometimes it will take a long time (few years?) to spread out.
Eventually, you still need to clean out the fungus. No way you can kill/remove it by only exposing it to UV / Sunlight.
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No longer member , please don't try to contact to him |
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