I guess one possible problem with blackout cloth may be dew absorption
making it heavier as the night goes on.
Darren.
John R Pierce wrote:
> Mark Wagner wrote:
>> I've built a 12.5" f/5 truss Dob, and am considering putting a shroud
>> on it. Right now, the scope's balance is just a tad light on the
>> front end, really, just a touch. One concern I have with a shroud is
>> throwing the balance too far forward. Yeah, I could stick some
>> weight in the back end, but I'd prefer to not do that. I can get
>> someone to sew the shroud for me, but I'm puzzled about what material
>> to use. I think it should be as lightweight as possible, black,
>> stretchy, and opaque enough to keep in-town light sources out.
>>
>> Any suggestions on the material? Help my uncover this mystery....
>> I'm not a "fabric" expert...
> hmmm. fabric stores have a material called 'blackout cloth' which
> is used behind drapes to allow you to darken a room. I believe it
> comes in both dark and white varieties. I wonder if that wouldn't be
> good to use? having a white side out could be advantageous in
> keeping the scope cooler when its outside in the sunlight, as well as
> making it easier to see on a dark field at night so folks don't
> stumble into it.
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Received on Wed Mar 05 14:36:11 2008