Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Equipment Discussions >> ATM, Optics and DIY Forum

Pages: 1 | 2 | (show all)
Mary B
Vendor - Echo Astronomy and Electronics
*****

Reged: 05/21/10

Loc: Minnesota
Re: Spray painting a 70" mirror?? new [Re: TxStars]
      #5544207 - 11/28/12 04:50 PM

He drives truck, I think he may have sources for shipping... awesome project and makes me jealous, all I have is a 10 inch dob well and my 6 inch RC

Post Extras: Print Post   Remind Me!   Notify Moderator  
cheapersleeper
Carpal Tunnel
*****

Reged: 01/22/10

Loc: Sachse TX
Re: Spray painting a 70" mirror?? new [Re: Mary B]
      #5544332 - 11/28/12 06:14 PM

Somehow, I have a feeling that the gentleman and his friends know what they are doing. This is not his first telescope...

Brad


Post Extras: Print Post   Remind Me!   Notify Moderator  
ed_turco
Pooh-Bah
*****

Reged: 08/29/09

Loc: Lincoln, RI
Re: Spray painting a 70" mirror?? new [Re: cheapersleeper]
      #5545545 - 11/29/12 01:27 PM

It is possible that this may be a joke.

Ed Turco


Post Extras: Print Post   Remind Me!   Notify Moderator  
Scanning4Comets
Markus
*****

Reged: 12/26/04

Re: Spray painting a 70" mirror?? new [Re: ed_turco]
      #5545639 - 11/29/12 02:27 PM

A joke? That telescope frame looks mighty REAL to me....That thing is gonna be HUGE when it is finished!

Cheers,


Post Extras: Print Post   Remind Me!   Notify Moderator  
Lynnblac
super member
*****

Reged: 04/06/09

Loc: Arizona
Re: Spray painting a 70" mirror?? new [Re: ed_turco]
      #5545651 - 11/29/12 02:42 PM

I do not think the group that has been working on this for more than 15 years considers their 70" scope a joke.

Post Extras: Print Post   Remind Me!   Notify Moderator  
seryddwr
Innocent Bystander
*****

Reged: 02/19/10

Loc: La-la land.
Re: Spray painting a 70" mirror?? new [Re: Lynnblac]
      #5545662 - 11/29/12 02:50 PM

I met this man about 10 years ago. It's not a joke. I suspect that they will chemically silver the mirror, using a spray gun to distribute the chemicals. Nothing else makes sense.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Scout92
member


Reged: 12/20/11

Loc: Hoquiam, WA.
Re: Spray painting a 70" mirror?? new [Re: seryddwr]
      #5570271 - 12/14/12 02:42 AM

Cool article

Post Extras: Print Post   Remind Me!   Notify Moderator  
Bill Whitehead
sage
*****

Reged: 07/11/09

Loc: Exit 135 - Garden St Parkway
Re: Spray painting a 70" mirror?? new [Re: Scout92]
      #5570492 - 12/14/12 09:06 AM

Howdy People,

It sounds like the 70" guy wants to observe with this monster. It also sounds like this thing is a really fast scope, like an f 1.5 or something close to it. Since it was supposed to be a spy satelitte it was created for a ccd camera in the place of the secondary.

So here is my question for you optics experts. Can this mirror focus an image that can be registered by a human eye? And, if so, what kind of eyepiece can be used?

peace, Bill


Post Extras: Print Post   Remind Me!   Notify Moderator  
cheapersleeper
Carpal Tunnel
*****

Reged: 01/22/10

Loc: Sachse TX
Re: Spray painting a 70" mirror?? new [Re: Bill Whitehead]
      #5570497 - 12/14/12 09:11 AM

The structure he is building certainly does not look like it is for a 70" f1.5.

B


Post Extras: Print Post   Remind Me!   Notify Moderator  
Bill Whitehead
sage
*****

Reged: 07/11/09

Loc: Exit 135 - Garden St Parkway
Re: Spray painting a 70" mirror?? new [Re: cheapersleeper]
      #5570603 - 12/14/12 10:28 AM

B,

I didn't really get a good look at the structure in the video I saw. However, there are limits to what you can put into space, especially in the 1970's. I'm assuming they weren't planning on using a Saturn rocket for this, so the tube would have to be a reasonable size. Not much bigger than a Gemini capsule, for example?

Bill


Post Extras: Print Post   Remind Me!   Notify Moderator  
danjones
super member


Reged: 09/26/12

Re: Spray painting a 70" mirror?? new [Re: TxStars]
      #5571823 - 12/15/12 12:16 AM

loptics.com check out the big mirrors that guy does. he even lists companies that he works with. he does all his mirrors on his own grinding machines. they are huge. good luck with spraying, and with an automotive gun? really? if it runs off a hose and pump, i'd worry about pump oils entering the mix.

Post Extras: Print Post   Remind Me!   Notify Moderator  
cheapersleeper
Carpal Tunnel
*****

Reged: 01/22/10

Loc: Sachse TX
Re: Spray painting a 70" mirror?? new [Re: danjones]
      #5571941 - 12/15/12 02:19 AM

I am amazed at the oddball comments from our Cloudy Nights crowd. The article refers to Steve Dobbs who owns Nova Optical Systems as being involved in this project. So an ATM who already has owned very large scopes and the owner of a company that does coatings are being subjected to cries of anguish from our peanut galler? Seriously, people, read the article and look up the names. I think these guys know exactly what they are doing.

Regards,
Brad


Post Extras: Print Post   Remind Me!   Notify Moderator  
dave brock
professor emeritus


Reged: 06/06/08

Loc: Hamilton, New Zealand
Re: Spray painting a 70" mirror?? new [Re: cheapersleeper]
      #5593059 - 12/28/12 06:05 PM

Looks to me like they'll be using a variation of this method of silvering.

http://angelgilding.com/PumpSpraySilverVideo.html

Dave


Post Extras: Print Post   Remind Me!   Notify Moderator  
mrlovt
member
*****

Reged: 09/08/12

Loc: Smyrna, TN
Re: Spray painting a 70" mirror?? new [Re: cheapersleeper]
      #5600218 - 01/01/13 07:47 PM

Quote:

I think these guys know exactly what they are doing.

Regards,
Brad




Cheers from this corner of the peanut gallery! These guys have a MASSIVE mirror on their hands; I can't wait to see what they do with it. Never second-guess a guy who loads a 40" telescope into a pickup truck and takes it around to show off the heavens!


Post Extras: Print Post   Remind Me!   Notify Moderator  
Jim Romanski
Carpal Tunnel
*****

Reged: 01/02/05

Loc: Guilford, Connecticut
Re: Spray painting a 70" mirror?? [Re: EJN]
      #5601453 - 01/02/13 03:42 PM

Hopefully they'll remember that the flat black paint is for the tube and not the mirror.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | (show all)


Extra information
13 registered and 22 anonymous users are browsing this forum.

Moderator:  ausastronomer, richard7, Starman81 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 2985

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics