Tube blackening question
There's been a fair amount of discussion on the Criterion Dynascope list I'm on lately regarding the best ways to blacken the inside tube of a newtonian. What seems to be the preferred method in this group anyway is to coat the inside of the tube with glue, then apply crushed walnut shells (avialable apparently at Petsmart) and spray paint with Krylon flat black. Many on the list discourage the use of flocked paper. What do the experts on this list think of this? Does such a procedure really make a noticeable difference over a simple coat of flat black paint on the inside of the tube sans the shells? Rich __________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com
Does anyone know of a Meade List or Meade Newsgroup that I could get the address for? Also, any for Unitron? With Meade, my specific interest is in the ETX Mak line. Thanks for any help anyone can provide. Jim Stitley _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy --------------------------------- Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!
Jim, Yahoo groups has exactly what you're looking for: http://groups.yahoo.com/group/ETXASTRO/ Not reading into the list too far, there are also other Meade groups in the Yahoo groups section if you go browsing for them (there's over 160 telescope groups alone). Rich --- Jim Stitley <sitf2000@yahoo.com> wrote:
Does anyone know of a Meade List or Meade Newsgroup that I could get the address for? Also, any for Unitron? With Meade, my specific interest is in the ETX Mak line. Thanks for any help anyone can provide. Jim Stitley _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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_______________________________________________
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Thank yuo SO much for the ETX Group. How do you search the total Tahoo telescopes groups??? Thanks again! Jim --- Richard Tenney <retenney@yahoo.com> wrote:
Jim,
Yahoo groups has exactly what you're looking for:
http://groups.yahoo.com/group/ETXASTRO/
Not reading into the list too far, there are also other Meade groups in the Yahoo groups section if you go browsing for them (there's over 160 telescope groups alone).
Rich
--- Jim Stitley <sitf2000@yahoo.com> wrote:
Does anyone know of a Meade List or Meade Newsgroup that I could get the address for? Also, any for Unitron? With Meade, my specific interest is in the ETX Mak line. Thanks for any help anyone can provide. Jim Stitley _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
--------------------------------- Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!>
_______________________________________________
Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
__________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy __________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com
Jim, goto: http://groups.yahoo.com/ and enter your group search terms....'telescope' brings up 197 groups currently. dlbennett On Tuesday, March 25, 2003, at 09:57 PM, Jim Stitley wrote:
Thank yuo SO much for the ETX Group. How do you search the total Tahoo telescopes groups??? Thanks again! Jim
--- Richard Tenney <retenney@yahoo.com> wrote:
Jim,
Yahoo groups has exactly what you're looking for:
http://groups.yahoo.com/group/ETXASTRO/
Not reading into the list too far, there are also other Meade groups in the Yahoo groups section if you go browsing for them (there's over 160 telescope groups alone).
Rich
--- Jim Stitley <sitf2000@yahoo.com> wrote:
Does anyone know of a Meade List or Meade Newsgroup that I could get the address for? Also, any for Unitron? With Meade, my specific interest is in the ETX Mak line. Thanks for any help anyone can provide. Jim Stitley _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
--------------------------------- Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!>
_______________________________________________
Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
__________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
__________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
THANK YOU, David I just did that and actually found a lot more, including Unitron which I was trying to locate. Thanks again!!! Jim David L Bennett <dlbennett@mac.com> wrote:Jim, goto: http://groups.yahoo.com/ and enter your group search terms....'telescope' brings up 197 groups currently. dlbennett On Tuesday, March 25, 2003, at 09:57 PM, Jim Stitley wrote:
Thank yuo SO much for the ETX Group. How do you search the total Tahoo telescopes groups??? Thanks again! Jim
--- Richard Tenney wrote:
Jim,
Yahoo groups has exactly what you're looking for:
http://groups.yahoo.com/group/ETXASTRO/
Not reading into the list too far, there are also other Meade groups in the Yahoo groups section if you go browsing for them (there's over 160 telescope groups alone).
Rich
--- Jim Stitley wrote:
Does anyone know of a Meade List or Meade Newsgroup that I could get the address for? Also, any for Unitron? With Meade, my specific interest is in the ETX Mak line. Thanks for any help anyone can provide. Jim Stitley _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
--------------------------------- Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!>
_______________________________________________
Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
__________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
__________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy --------------------------------- Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!
A good grade of flocked paper is all you need. Photographic-quality does not shed, and it can sometimes be found with a self-adhesive backing. I believe that TeleVue now uses flocked paper exclusively. The days of walnut hulls and grit suspended in goo are long-gone. If you want little pieces of grit constantly falling on your mirror, go this route. Differential expansion of materials will almost guarantee that this matrix will fall apart in time. The secret is to not allow light to hit the tube interior wall in the first place. This can be accomplished by an opening aperture slightly smaller than the tube ID itself, I typically go about 3/8". This still leaves room for warm air to rise out of the optical path, assuming a 1" clearance between mirror edge and tube wall. Criterion used a smaller-than-usual tube on the Dynamax, IIRC, so I would just recommend the flocked paper. I have purchased flocked paper from Edmund, Protostar, and locally at Wasatch Photographic. C. --- Richard Tenney <retenney@yahoo.com> wrote:
There's been a fair amount of discussion on the Criterion Dynascope list I'm on lately regarding the best ways to blacken the inside tube of a newtonian.
What seems to be the preferred method in this group anyway is to coat the inside of the tube with glue, then apply crushed walnut shells (avialable apparently at Petsmart) and spray paint with Krylon flat black.
Many on the list discourage the use of flocked paper. What do the experts on this list think of this? Does such a procedure really make a noticeable difference over a simple coat of flat black paint on the inside of the tube sans the shells?
Rich
__________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com
_______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com
http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy __________________________________________________ Do you Yahoo!? Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop! http://platinum.yahoo.com
participants (4)
-
Chuck Hards -
David L Bennett -
Jim Stitley -
Richard Tenney