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Which material For Making A Light Shroud?

DIY dob reflector beginner
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7 replies to this topic

#1 Naraya

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Posted 09 November 2018 - 06:41 AM

Hey guys,
I just recently bought a heritage 130p, (mostly because of cheap shipping costs through the flextube) but the flextube does come with a downgrade of contrast

Tl;dr
Basically what materials should i use to make the light shroud? i am at a lost of ideas because most are either not opaque, or opaque but reflectice

#2 cookjaiii

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Posted 09 November 2018 - 07:50 AM

Check out the thread here on CN devoted to the AWB OneSky.  Search "light shroud".  There is an overwhelming abount of information there about all aspects of your telescope (the Heritage 130 is the same scope).  

 

I used craft foam sheets and some duct tape or gaffer's tape.  They are opaque.  The reflectivity is not high.  

https://www.michaels...wE&gclsrc=aw.ds

 

Some folks use thin Kydex sheets.  It is opaque but a bit reflective.  You could flock it.

 

I also experimented with a fabric exterior shroud using black velvet. It worked well, but I went back to the hobby foam.


Edited by cookjaiii, 09 November 2018 - 07:50 AM.

  • stargazer193857 and Augustus like this

#3 stargazer193857

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Posted 09 November 2018 - 03:22 PM

I'm going to see two layers together. Velvet on the inside, which is blacker than black fabric, and some black fabric outside that, since velvet is very see through. I don't know what outside fabrick I'll use. Likely tall put the fabric inside the truss not outside.

#4 Naraya

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Posted 10 November 2018 - 09:15 AM

Check out the thread here on CN devoted to the AWB OneSky.  Search "light shroud".  There is an overwhelming abount of information there about all aspects of your telescope (the Heritage 130 is the same scope).  

 

I used craft foam sheets and some duct tape or gaffer's tape.  They are opaque.  The reflectivity is not high.  

https://www.michaels...wE&gclsrc=aw.ds

 

Some folks use thin Kydex sheets.  It is opaque but a bit reflective.  You could flock it.

 

I also experimented with a fabric exterior shroud using black velvet. It worked well, but I went back to the hobby foam.

 

Check out the thread here on CN devoted to the AWB OneSky.  Search "light shroud".  There is an overwhelming abount of information there about all aspects of your telescope (the Heritage 130 is the same scope).  

 

I used craft foam sheets and some duct tape or gaffer's tape.  They are opaque.  The reflectivity is not high.  

https://www.michaels...wE&gclsrc=aw.ds

 

Some folks use thin Kydex sheets.  It is opaque but a bit reflective.  You could flock it.

 

I also experimented with a fabric exterior shroud using black velvet. It worked well, but I went back to the hobby foam.

Alright, i might use craft foam sheets because of the availability, thanks.



#5 stargazer193857

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Posted 23 November 2018 - 12:54 AM

Check out the thread here on CN devoted to the AWB OneSky. Search "light shroud". There is an overwhelming abount of information there about all aspects of your telescope (the Heritage 130 is the same scope).

I used craft foam sheets and some duct tape or gaffer's tape. They are opaque. The reflectivity is not high.
https://www.michaels...wE&gclsrc=aw.ds

Some folks use thin Kydex sheets. It is opaque but a bit reflective. You could flock it.

I also experimented with a fabric exterior shroud using black velvet. It worked well, but I went back to the hobby foam.


Thanks will do. I wonder if McMaster Carr sells larger sheets. Correct about the weight being neglugible. They would also block external heat from truss poles, as well as my breath. They are the best flat black I've seen.

#6 Dale Eason

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Posted 23 November 2018 - 11:26 PM

I found some very black and opaque material at Jo-anns in the cosplay section.  Stretchy with a rubber like coating on one side.  $38 per yard.



#7 stargazer193857

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Posted 24 November 2018 - 01:52 AM

I found some very black and opaque material at Jo-anns in the cosplay section. Stretchy with a rubber like coating on one side. $38 per yard.


Please tell us.
I have black foam. It is just a bit brighter than the inside of my telescope tube paint. And much flatter than black construction paper. Very opaque, but I don't recommend it on its own. 1/16" may be thicker than need be.

I recommend velvet, which is much blacker than all 3 at all angles. So is the outside black gloss of the metal telescope tube, but the velvet is blacker than that too. And cheap.

#8 stargazer193857

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Posted 24 November 2018 - 01:54 AM

For the 130, foam sheets will get to solid tube status. Attaching velvet to the inside of the foam would be better. Velvet is not opaque.


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