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peterqd



Level 3

Joined: 28 Feb 2007
Posts: 2201
Location: High Wycombe, UK
PostPosted: Tue Jul 01, 2008 7:13 pm    Post subject: Reply with quote
LucisPictor wrote:
As far as I know, it is not only humidity.
Fungus need three things to grow:
- nutrition (esp. organic material)
- darkness
- humidity (but a constantly high humidity of 60% is not too bad, much worse is regular and quick change of rel. humidity and temperature because this will cause little droplets inside the lens and this creates perfect conditions for fungus)

Fungus also needs still air, no ventilation, and this is what worries me about keeping lenses in a cabinet. I guess your dehumidifier is really effective Carsten, but do you have to monitor the RH and switch it on manually, or is it controlled by an auto humidistat?
_________________
Lenses: M42 - CZJ 2.8/20, 2.4/35, 1.8/50, 2.8/50, 3.5/135 - Meyer/Pentacon 1.8/50, 2.8/50, 2.8/135, 4/200
Russian - J9, J21, J37A, M1v, M24m, I50-2, H44m-4 Vega12
Takumar 3.5/28, 3.5/35, 1.4/50, 1.8/55, 1.9/85, 3.5/135 - Vivitar 2.8/28
K-mount : Pentax-M 2.8/28, 1.7/50 - Tamron zooms :SP28-80, SP35-80, SP60-300, 80-210
DSLR:Canon 400D 35mm SLR: Pentax Spotmatic SP, SPII, SPF, ME Super, K2 - Chinon CE-3 - Minolta XG-M - Praktica Nova 1B, PLC2
Rangefinder: Zorki-4, Beauty Light-o-matic II Medium Format: Yashica-Mat 124G
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Attila



Level 4

Joined: 24 Feb 2007
Posts: 13821
Location: Budapest,Hungary
PostPosted: Tue Jul 01, 2008 7:18 pm    Post subject: Reply with quote
In my experience better to keep them in dry cabinet than in room with air if humidity is high.
_________________

Olympus E-1,Nikon FA,Pentax MX,Praktica VLC3,Olympus-OM2N,Yashica Eletro 35 GN,Exakta Varex IIb,
-------------------------------------------------------------------------------------------------------------------
Carl Zeiss Jena:Flektogon 2.8/20mm,4/25mm,2.4/35,2.8/65mm,4.5/4cm Tessar
Pancolar 1.4/55mm,1.8/50mm,1.8/80mm,Tessar 2.8/50mm,Biotar 2/58mm,1.5/75mm,1.5/7,5cm
Carl Zeiss: Sonnar 2.8/135,2.8/180mm,Tessar 4/135mm
Nikon: 3.5/20mm,2.8/28mm,1.4/35mm,1.4/50mm,1.2/50mm,2/50mm,1.8/105mm,2.5/105mm,2.8/180mm,4/200mm macro,4.5/300mm
Pentax: Pentax 1.2/50mm,1.8/85mm,4/200mm
Helios: Helios-40 1.5/8,5cm,Helios-44-1 2/58mm,Helios-44-2 2/58mm
Olympus OM: 3.5/18mm,3.5/21mm,1.4/50mm,3.5/55mm macro,2.8/135mm,2/90mm macro,35-70mm,60-250mm
Meyer: 4.5/35mm Primagon,Primoplan 1.9/58mm,1.9/75mm,2.8/100mm,Orestegor 2.8/135mm,4.5/40 Helioplan

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LucisPictor



Level 4

Joined: 26 Feb 2007
Posts: 6821
Location: Oberhessen, Germany / Maidstone ('95-'96)
PostPosted: Tue Jul 01, 2008 8:20 pm    Post subject: Reply with quote
peterqd wrote:
LucisPictor wrote:
As far as I know, it is not only humidity.
Fungus need three things to grow:
- nutrition (esp. organic material)
- darkness
- humidity (but a constantly high humidity of 60% is not too bad, much worse is regular and quick change of rel. humidity and temperature because this will cause little droplets inside the lens and this creates perfect conditions for fungus)

Fungus also needs still air, no ventilation, and this is what worries me about keeping lenses in a cabinet. I guess your dehumidifier is really effective Carsten, but do you have to monitor the RH and switch it on manually, or is it controlled by an auto humidistat?


Very true, Peter, I forgot. Ventilation is important to prevent fungus.
I open my cabinet several times a day. And the dehumidifier is a chemical one and thus constantly active. It just has to be recharged (just by connecting it to the mains for an hour) every two weeks. The little dhumidifying balls inside are dried then.
_________________
"Schnäppchenjäger" | "KAPCTEH" | "Karusutenu" | "Carsten" | T-shirt?
Cams in use: EOS 40D, EOS 350D, EOS500, Spotmatic SPII, Yashica-24, EXA I & 1c, Zenit EM; Oly 35RC,Minolta Hi-Matic E & F, Ricoh 500RF, Yashica Electro 35 GS, FED-3b and some others...
Lenses in use: Asahi Pentax: 2.8/28;3.5/35;1.4/50;1.7/50;2.8/105;28-80 | Canon (AF):1.8/50;17-85;75-300 | Former GDR: Pentacon 3.5/30; Pentaflex 1.8/50; CZJ 2.8/50; CZJ 4/135; Pentacon 4/200 | Fujinon: 43-75 | Hanimex: 3.5/23; 4/100;80-200 | Hoya: 25-42;80-205 | Kiron: 2/28;70-210 | Leica: Elmarit-R 2.8/35 | Minolta: 1.7/50 | Nikkor: 2.8/24;2/35;2/50;1.2/55;1.8/85;3.5/135 | West German: Ludwig 2.9/50; Meyer 2.8/100; Will 4.5/105; Enna 3.5/135; Zeiss 4/135;Isco 4/135; Enna 4.5/240 | Olympus: 3.5/28;1.4/50;3.5/135 | Rikenon: 1.7/50;35-70 | Rollei/Voigtländer: 1.4/55;1.8/50 | Russian: Peleng3.5/8; Zenitar2.8/16; MIR2.8/37; Volna2.8/50; Industar3.5/50; Industar3.5/5cm; Helios2/50; Helios2/58; Volna2.8/80; Jupiter2/85; Kaleinar2.8/100;Tair2.8/135; Jupiter3.5/135; Jupiter4/135; Telear3.5/200; Jupiter4/200; Tair4.5/300;RF: Jupiter2.8/35;Industar2.8/53 | Sigma: 28-85;28-105(AF);17-70(AF) | Soligor: 28-105;35-200;70-220 | Tamron: 2.5/24;2.5/135;2.8/135;60-300;70-210 | Tokina: 28-105;80-200;12-24(AF);70-210(AF) | Vivitar: 3.5/17;2/24;2/28;2.5/28;2.8/28 | Yashica: 1.7/50;2/5cm | Other Japanese: Cosina3.8/20; Petri2.8/28; Albinar2.8/28; Porst1.8/35; 2.8/135; Weltblick3.5/135; Beroflex 8/500; Spiratone28-200; Maginon70-210
Green are the lenses I shoot the most.
More? http://forum.mflenses.com/viewtopic.php?t=65
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peterqd



Level 3

Joined: 28 Feb 2007
Posts: 2201
Location: High Wycombe, UK
PostPosted: Tue Jul 01, 2008 9:25 pm    Post subject: Reply with quote
LucisPictor wrote:
[And the dehumidifier is a chemical one and thus constantly active. It just has to be recharged (just by connecting it to the mains for an hour) every two weeks. The little dhumidifying balls inside are dried then.

That's clever! I should have known you'd thought about that. Smile
_________________
Lenses: M42 - CZJ 2.8/20, 2.4/35, 1.8/50, 2.8/50, 3.5/135 - Meyer/Pentacon 1.8/50, 2.8/50, 2.8/135, 4/200
Russian - J9, J21, J37A, M1v, M24m, I50-2, H44m-4 Vega12
Takumar 3.5/28, 3.5/35, 1.4/50, 1.8/55, 1.9/85, 3.5/135 - Vivitar 2.8/28
K-mount : Pentax-M 2.8/28, 1.7/50 - Tamron zooms :SP28-80, SP35-80, SP60-300, 80-210
DSLR:Canon 400D 35mm SLR: Pentax Spotmatic SP, SPII, SPF, ME Super, K2 - Chinon CE-3 - Minolta XG-M - Praktica Nova 1B, PLC2
Rangefinder: Zorki-4, Beauty Light-o-matic II Medium Format: Yashica-Mat 124G
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zewrak



Level 3

Joined: 12 Apr 2008
Posts: 673
PostPosted: Wed Jul 23, 2008 8:21 am    Post subject: Reply with quote
Have not read the whole thread, but has anyone tried the Humibox? They are quite cheap, the smaller ones atleast.

http://www.shutterbug.com/news/060308humibox/

http://flickr.com/photos/ruel_photo/2252319863/
_________________
My Flickr - Takumar.org
PENTAX K10D, Spotmatic
Asahi Auto Takumar 85/1.8
Asahi Takumar 105/2.8 135/3.5
Asahi Super Takumar 20/4.5 50/1.4 55/1.8 85/1.9 105/2.8 135/3.5 150/4 200/4
Asahi S-M-C Takumar 35/3.5 300/4
Asahi S-M-C Macro-Takumar 50/4,100/4
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