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lumens pixel
Joined: 27 Feb 2019
Posts: 880
Expire: 2021-06-25
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 Posted: Wed Apr 03, 2024 9:49 am Post subject: Is it fungus? |
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lumens pixel wrote:
On some of my lenses I see some small dots surrounded by a haze halo. This is not the spider like mold usually associated with fungus but I am afraid that it could be the first stage of development.
It is not so easy to take a pic of that but I will try to if what I state is unclear.
I also thought of some kind of out-gassing that would concentrate on dust spots that would not be that bad.
If you have any clue I am interested.
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Lumens Pixel
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Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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Himself
Joined: 01 Mar 2007
Posts: 3245
Location: Montreal
Expire: 2013-05-30
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| Posted: Wed Apr 03, 2024 1:41 pm Post subject: |
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Himself wrote:
Put up a picture.
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RokkorDoctor
Joined: 27 Nov 2021
Posts: 1424
Location: Kent, UK
Expire: 2025-05-01
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| Posted: Wed Apr 03, 2024 2:16 pm Post subject: |
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RokkorDoctor wrote:
Yes, a picture would help but just going by your description my best guess would indeed be early stage fungus.
One of two possibilities spring to mind if it is indeed fungus:
1) The lens(es) having been subjected to a relatively short continuous period of RH over 70%, for maybe a couple of weeks at most, followed by plummeting RH levels which made the freshly germinated fungus go dormant.
2) The lenses having been very clean (no organic dust & no grease/oil/fingerprints) so the germinated spores did not find any/sufficient nutrient sources and again, went dormant.
The lenses where I have had this happen to in the past tend to still clean up fine with a bit of isopropyl alcohol if you can access the glass surfaces affected.
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Mark
SONY A7S, A7RII + dust-sealed modded Novoflex/Fotodiox/Rayqual MD-NEX adapters
Minolta SR-1, SRT-101/303, XD7/XD11, XGM, X700
Bronica SQAi
Ricoh GX100
Minolta majority of all Rokkor SR/AR/MC/MD models made
Sigma 14mm/3.5 for SR mount
Tamron SP 60B 300mm/2.8 (Adaptall)
Samyang T-S 24mm/3.5 (Nikon mount, DIY converted to SR mount)
Schneider-Kreuznach PC-Super-Angulon 28mm/2.8 (SR mount)
Bronica PS 35/40/50/65/80/110/135/150/180/200/250mm |
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lumens pixel
Joined: 27 Feb 2019
Posts: 880
Expire: 2021-06-25
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| Posted: Thu Apr 04, 2024 7:34 am Post subject: |
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lumens pixel wrote:
| Himself wrote: |
| Put up a picture. |
The two spots at the left of the blue dot.
_________________
Lumens Pixel
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Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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Himself
Joined: 01 Mar 2007
Posts: 3245
Location: Montreal
Expire: 2013-05-30
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| Posted: Thu Apr 04, 2024 1:51 pm Post subject: |
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Himself wrote:
I can't see the spidery web but it could be a beginning.
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lumens pixel
Joined: 27 Feb 2019
Posts: 880
Expire: 2021-06-25
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| Posted: Thu Apr 04, 2024 5:33 pm Post subject: |
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lumens pixel wrote:
| Himself wrote: |
| I can't see the spidery web but it could be a beginning. |
Thank you. Hope to read additional opinions.
_________________
Lumens Pixel
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Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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Himself
Joined: 01 Mar 2007
Posts: 3245
Location: Montreal
Expire: 2013-05-30
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| Posted: Thu Apr 04, 2024 8:06 pm Post subject: |
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Himself wrote:
What lenses?
If they're not that valuable scrap them.
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visualopsins
Joined: 05 Mar 2009
Posts: 11019
Location: California
Expire: 2025-04-11
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| Posted: Thu Apr 04, 2024 8:14 pm Post subject: |
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visualopsins wrote:
| Himself wrote: |
What lenses?
If they're not that valuable scrap them. |
Value is relative, yes? I once sold a bunch of fungus-infested zoom lenses to a fellow in Indonesia who was so happy to get them! He took them apart, repaired them, & resold at a nice profit.
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☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
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-A 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 (151B), 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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lumens pixel
Joined: 27 Feb 2019
Posts: 880
Expire: 2021-06-25
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| Posted: Thu Apr 04, 2024 11:15 pm Post subject: |
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lumens pixel wrote:
| Himself wrote: |
What lenses?
If they're not that valuable scrap them. |
It is a Tamron 01b. Not expensive. But it is my third copy. One was completely fungi infested and the second was decentered. So price is not the issue but I struggle much more than 10 years ago buying good lenses. In the good old days a lemon was an exception. Now it is the other way around.
_________________
Lumens Pixel
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Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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BrianSVP
Joined: 09 Jun 2023
Posts: 351
Location: Philadelphia
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| Posted: Mon Apr 15, 2024 9:22 pm Post subject: |
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BrianSVP wrote:
These Tamron BBAR lenses are absolutely the worst for fungus. There's just something about the coatings that fungus finds delicious. I'd say probably at least 9 out of 10 Tamron BBAR lenses of that generation have some degree of fungus if you look closely enough.
What you are seeing in these pictures is where a dust mote settled on the lens surface carrying a fungal spore, and a culture got established (the round halo around it). The fungus is spreading out from the mote in the middle and if allowed to grow will develop into the more familiar web pattern. |
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lumens pixel
Joined: 27 Feb 2019
Posts: 880
Expire: 2021-06-25
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| Posted: Tue Apr 16, 2024 5:30 pm Post subject: |
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lumens pixel wrote:
| BrianSVP wrote: |
These Tamron BBAR lenses are absolutely the worst for fungus. There's just something about the coatings that fungus finds delicious. I'd say probably at least 9 out of 10 Tamron BBAR lenses of that generation have some degree of fungus if you look closely enough.
What you are seeing in these pictures is where a dust mote settled on the lens surface carrying a fungal spore, and a culture got established (the round halo around it). The fungus is spreading out from the mote in the middle and if allowed to grow will develop into the more familiar web pattern. |
Bad news. I also have a 46A with the same problem. Both the 01A and the 46A that are fungused are the best out of three samples so I keep them despite my ire.
_________________
Lumens Pixel
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Minolta SR mount: 16 2,8; Sigma SuperWide 24 2,8; 28 2,5; 28 2,8; 28 3,5; 35 2,8; 45 2,0; 50 1,4; 50 1,7; 50 2,0; 58 1,4; 85 2,0; 100 2,5; 100 4 Macro; 135 3,5; 135 2,8; 200 4; RF 250 5,6; 24-35 3,5; 35-70 3,5; 75-150 4; 70-210 4
Canon FD mount: Tokina RMC 17 3,5; 28 2,8; 35 2,8; 50 1,8; 50 3,5 Macro; 55 1,2; 135 3,5; 135 2,5; 200 4,0; 300 5,6; 28-55 3,5 4,5; Tokina SZ-X SD 270; 70-150 4,5; 70-210 f4; 80-200 4L; Tokina SZ-X 845
Tamron Adaptall: 28-80 3,5-4,2 (27A); 70-210 3,8-4 (46A); 60-300 (23A); 90 2,5 (52B); 35-135 3,5-4,5 (40A)
Tamron SP: 20-40 2,7-3,5 (266D) |
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