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ok tonight is the first time the dobs got properly dewed up, i always give a second check inside after bringing the telescope inside maby half hour later..just for peace of mind that a spider hasent crawled in or something...

my mirror is really murky/misty :)

do i leave the cap of and just let it dry off? not much else i can do? is this normal??:)

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leave it in a room with minimal heating. this primary mirror misting/fogging has happened on all my scopes. it did take a few days to fully clear from my mak though.

that is what has brought me in tonight though so gonna invest in a heat band, my dew shield works for the front mirror.

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It's quite normal. I leave my scopes capped and let the dew evaporate away at it's own pace. Others leave theirs uncapped. Not sure if it makes much difference - the main thing is to resist the urge to wipe !

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this is what it looks like, its really misty/and then theres an even worse patch on top:( it acctualy looks worse in person than the picture shows.

Im glad its normal though, should the mirror return to normal if i just leave it alone? il put the cap back on and try and forget about it

P1020631.jpg

Edited by Madhatter

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It will dry up ok,i leave the caps on my flextube and just angle it at 45 % (probably doesnt make much differance but its a habbit now !),but like john said dont wipe it.

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You can safely use a hair-dryer. The mirror won't crack (even on high heat) and the dryer doesn't seem to blow significant dust into the mirror. I dry mine all the time. As soon as they come in through the door the dryer comes out. The ideal situation is to store the scope in a dry, unheated, porch or basement. Then you won't get condensation at all. The condensation isn't a problem in itself, but mirrors do get dirty faster if they are repeatedly exposed to humidity in this way. In the long-term, cleaning with distilled water and perhaps lab-grade ethanol will get rid of gunk thus accrued. You don't need to use cotton or otherwise rub the mirror. Don't worry about cleaning for at least another few months.

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thats great to hear, iv never had it like this before and it made me worrie quite alot! i think a dew shield has to be next on the long line of things i need to buy :)

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Dew-shield won't stop what you saw: that stuff formed because you bring a cold object into a warm room. Basically, the telescope's tube is already functioning as a dew-shield for the primary. However, the dew-shield may delay dewing of the secondary when you're outdoors and it's humid.

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I give mine a wipe with a rung out dischcloth and a very small amount of turps.

You would do a better job with 60 grit sand paper.

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You would do a better job with 60 grit sand paper.

Thanks mate,still got a couple of nasty marks on it so may try it latter.

Che

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Should I not use my power sander on the mirrors then? lol :)

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I give mine a wipe with a rung out dischcloth and a very small amount of turps.

is there any scratches on the mirror most mirrors do have a resin layer(all and most sky watchers have this) have you been drinking the turps can you post a pic of you mirrors ?

i joke of course

Edited by todd8137

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I give mine a wipe with a rung out dischcloth and a very small amount of turps.

lmao :)

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I give mine a wipe with a rung out dischcloth and a very small amount of turps.

My jetwash works well, especially the rotating brushes attachment that I usually use on the patio.

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is there any scratches on the mirror most mirrors do have a resin layer(all and most sky watchers have this) have you been drinking the turps can you post a pic of you mirrors ?

Been hard to focus a lot lately, howver Ive heard WD40 is very good at rejuvinating stuff and getting rid of grease etc etc etc etc.

So im off to B&Q ( or perhaps Wickes, or Jewson ( if they are open around our way) to buy some ( or own bran equivalent ) )

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Been hard to focus a lot lately, howver Ive heard WD40 is very good at rejuvinating stuff and getting rid of grease etc etc etc etc.

So im off to B&Q ( or perhaps Wickes, or Jewson ( if they are open around our way) to buy some ( or own bran equivalent ) )

I hope there are no newbies reading this and not getting the Sgl humour :)

The hairdryer advice is ok, but not absolutely necessary.....ignore the rest

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Hahaha! too funny :)

Newbies please note that mirrors and optics should not even be touched :)

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Hahaha! too funny :)

Newbies please note that mirrors and optics should not even be touched :cool:

TOO LATE

Looking for a new mirror.:)

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TOO LATE

Looking for a new mirror.:)

Seriously ?

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NO :) I never clean anything that what the wife is for.:)

Ohhh ..... you got me there :cool:

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NO :) I never clean anything that what the wife is for.:)

I wish, If a jobs worth doing do it yourself!!

I find an electric polishing mop (10inch) and a bit of rubbing compound does the trick :cool: or even good old T-Cut!!

oh but rub it all down with a bit of 1500 wet and dry first!! lol

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