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Internal condensation.

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#1 25585

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Posted 17 January 2020 - 07:35 AM

How do you remove internal condensation, and prevent it occuring again?



#2 SeattleScott

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Posted 17 January 2020 - 07:48 AM

Dessicant pack in eyepiece kit?

#3 cookjaiii

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Posted 17 January 2020 - 07:56 AM

Inside telescope?  Inside eyepieces?

 

To prevent, 


(1) Dry your optics out before you take them outside in the cold.  Store optics in air-tight containers (plastic bags, Tupperware) with desiccant packs.

 

(2) At the end of a viewing session, wrap up your optics outside before bringing them inside from the cold.  Lens caps and plastic bags work.  Let everything warm up thoroughly before unwrapping them (this may take hours, depending on the item).

 

To get rid of it, wrap your optics in plastic with some desiccant packs inside and wait until condensation is gone. This could take hours, or days depending on how airtight the internal compartment.  Gentle warming will accelerate the process.

 

Condensation can lead to fungus growing on your optics, so it's good you noticed in time.


Edited by cookjaiii, 17 January 2020 - 07:57 AM.

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#4 Spikey131

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Posted 17 January 2020 - 08:01 AM

1. Rice will also work as a desiccant.

2. Nitrogen purged eyepieces will not have this problem.

3. I have never seen this with my any of my EPs despite observing in the soggy NE USA.
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#5 Starman47

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Posted 17 January 2020 - 08:05 AM

Nitrogen purged eyepieces and desiccant packs.



#6 BFaucett

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Posted 17 January 2020 - 08:29 AM

1. Rice will also work as a desiccant.

2. Nitrogen purged eyepieces will not have this problem.

3. I have never seen this with my any of my EPs despite observing in the soggy NE USA.

 

Nitrogen purged eyepieces and desiccant packs.

 

Don't forget Argon. smile.gif



#7 star drop

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Posted 17 January 2020 - 09:44 AM

Also keep your eyepieces in a closed box and take them out when swapping and place the previous one back into the box if it is dry. I never use those eyepiece trays that are attached to a telescope. If one must do so then rig up some type of cover over the tray.



#8 junomike

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Posted 17 January 2020 - 07:48 PM

IMO prevention is the best solution.



#9 25585

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Posted 17 January 2020 - 08:20 PM

My new APM UFF 24mm, from APM, was left in the rain by UPS. It's box was not put in a waterproof bag when packed. So the waterlogged outer box, that fell to bits, had made my ep damp.

 

It has dried out inside now, but obviously there is a risk of it recurring. My Baader Morpheus, Pentax , ES, Nikons all have damp proofing & never have a problem.     



#10 decep

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Posted 18 January 2020 - 10:00 AM

I have a few eyepieces that are prone to this.  I specifically recall having to deal with this repeatedly with my Meade 26mm Super Plossl smoothie.

 

Obviously, the EP is not sealed like the Nitrogen/Argon purged types.  The eye lens is larger than average for EP of this size and hardly recessed.  It is also completely metal.  It is pretty much optimized for not retaining any heat.  :-)

 

If I leave the EP in the scope when it gets to the dew point, it will dew internally.  Even if I cover it when not using.

 

The only fix is keeping the EP warm.


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#11 faackanders2

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Posted 19 January 2020 - 10:14 PM

How do you remove internal condensation, and prevent it occuring again?

Flower drying decadent.  Place occular in closed container with opened container of decadent,  if water can get in, decadent will dry it out.  


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