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10-18-2008, 08:23 AM   #1
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moisture inside lens

it condensates inside to the middle of the front element, creating a blurry spot.

what to do?

i have a little bag of silica gel that came with the lens. should i keep the lens in warm or cold? should i open the bag of silica or it works inside bag?

thanks for your suggestions.

10-18-2008, 09:02 AM   #2
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Easing the lens into a similar temperature to where you're experiencing the condensation will help eliminate it. If you have the opportunity, allow your camera bag to sit unopened in the environment where the fogging occurs long enough that its contents (your lenses) have had the chance to warm up.

For example, if you walk out of an air conditioned suite into a hot tropical day, your lens will fog. Wear your camera bag around long enough that your equipment warms closer to the exterior temperature before using it.

If a lens is fogged, it will stay that way until it reaches the ambient temperature of its environment. Wind is your friend. The moisture isn't doing anything good for your lens, but it isn't bad if you dry it out. Don't let the moisture sit in there for a length of time or you'll risk getting mold, the road back from there is arduous.

Desicant packets are a good idea, I keep one in each pouch. DO NOT open them, they absorb through the packets. Last thing you need is a pile of desicant powder in your lens.

Good luck,


Kelly.
10-18-2008, 09:29 AM   #3
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Ditch that tiny packet. Also, silica gel will eventually get saturated--and it needs to be reactivated by baking.

Buy one of these for your camera/lens bag/case.

Cabela's -- Hydrosorbent Silica Gel

It can be reactivated indefinitely.
10-18-2008, 09:42 AM   #4
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thanks but this havent happened to me before. sure, its normal to have fog on lens when i change environments, but this time its INSIDE the lens and it wasnt there before. it must have gotten there when i was cleaning the lens with the cleaning liquid. i need to get it out of there, but how?

10-18-2008, 10:45 AM   #5
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QuoteOriginally posted by jani Quote
thanks but this havent happened to me before. sure, its normal to have fog on lens when i change environments, but this time its INSIDE the lens and it wasnt there before. it must have gotten there when i was cleaning the lens with the cleaning liquid. i need to get it out of there, but how?
Gads.
Leave the lens in the sun to heat up for a day and hope the condensation goes away.
leave the front cap off, but leave the rear cap on and let it sit facing the sky. The only other suggestion I can make is that if you can't get the moisture to evaporate out on it's own, either replace the lens or have it disassembled for cleaning.

And stop being so fussy about having a clean lens. More lenses get damaged by over zealous cleaning than all other factors combined.
And never, ever put cleaning fluids directly onto a lens. Put a few drops onto a cleaning cloth and use that for cleaning.
10-18-2008, 10:55 AM   #6
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QuoteOriginally posted by Wheatfield Quote
Gads.
Leave the lens in the sun to heat up for a day and hope the condensation goes away.
leave the front cap off, but leave the rear cap on and let it sit facing the sky. The only other suggestion I can make is that if you can't get the moisture to evaporate out on it's own, either replace the lens or have it disassembled for cleaning.

And stop being so fussy about having a clean lens. More lenses get damaged by over zealous cleaning than all other factors combined.
And never, ever put cleaning fluids directly onto a lens. Put a few drops onto a cleaning cloth and use that for cleaning.
thanks, i will try that.
as for cleaning the lens, i agree less is more. today i just had a rather large fingerprint that needed to be removed.
10-18-2008, 12:08 PM   #7
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Putting in dry place is much more important not hot or cold place. But as somebody suggested, acclamatizing the lens with the weather where condensation happening is also a good idea.
You need to activate Silica gel by heating it above 100 deg Celcious for about 3-4 hrs and then use it in the lens bag along with the lens. for finger marks use lintless cloth to wipe it off after putting 2-3 drops of methanol or lens cleaning solution.

Atindra
10-18-2008, 05:30 PM   #8
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i placed it to a warm air place along with a bag of silica and it seems to be fine now.
thanks to everyone for your input

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