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Funky foam fun


Tweedledee
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I made one of these last week for my telrad as it always dewed up really quickly. It really does work well and the couple of times i have had the scope out it has not dewed up at all. Picked the foam up off ebay for about £1.50 for 2 x A4 sheets.


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Reckon you got the same foam as me then Mark.


 


Glad I had two sheets, 'cos I ballsed up the first sheet with a cut in the wrong place, even though I was being very careful  :screwloose:  :D .


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Easy done Pete. Glad i have a spare one though, for myself or anyone else that need one in future.


Also i was able to make a small dew shield for my 8x50 finder with the cut off so very little waste.


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Please feel free to copy the design and dimensions on my drawing or modify in any way.


 


I might be looking to collect some royalties at some stage, such as a peek through a 12" dob, cheers. :)


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I have one of those but sorry to tell you it had little effect on my dew problems. So I've now done the 3W resistor mod :)

I've also heard various mixed reports. I'm sure dew forming conditions vary greatly in different areas with different set ups. I have read reports that some people only manage to successfully stave off dew using combination of both electrical and shielding methods. But I'm sure that dewing something is better than dewing nothing, Sorry :facepalm: .

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I'm pleased my skills and knowledge have come in handy some where. ;-)

Your drawings are very precise, very useful, thank you Encyclopeteia :-)

Cheers Cazz.

 

You've certainly been an inspiration :) .

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Here's some info worth reading about dew and its control...


http://www.astro-tom.com/tips_and_advice/dewing.htm


 


Sometimes simple things work.


As mentioned in the above article, if you have a large tree close behind you whilst observing, the tree is likely to collect most of the dew in preference to your optics. Obviously you will only be able to observe the part of the sky not obscured by the tree, but nothings ever perfect :D .


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Well I do live further north than most of you so perhaps my dew problems are worse :) however I found the resistor mod really helpful for the telrad. If the dew shield alone does it for you then your luckier than me in the dew stakes :D

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