Image of the day

Captured by
Anthony Zinnanti

Messier 101

About Astromart

My Account

New to Astromart?

Register an account...

Need Help?

Posts Made By: Kurt King

September 13, 2003 03:28 PM Forum: Telescope Making

Hello, BIG, thin Mirror Makers

Posted By Kurt King
I just went out on a limb and aquired(gulp), some 25" diameter, .960" thick quartz blanks. I have successfully made a 19" F/4 1" thick plate glass mirror, but is this size stretching it a bit? Has anyone made or know of someone who has made a thin mirror this size? I have some generated convex tooling so most of the material will be removed from the center only, leaving the edge thickness intact. The backs are flat to .0003". It was get the quartz now or lose it forever so I jumped on it.

September 19, 2003 05:40 AM Forum: Eyepieces

Nagler 13MM T1 differences

Posted By Kurt King
Friends, you have probably been following the bidding on Nagler eyepieces on E..y. There are currently 2 Nagler 13MM t1's. One is the smooth barrel older Nagler we are all familar with. There is also a bigger 13mm that has the rubberized grip around the barrel. I have never seen that one and it too is described as an older t1. Can someone help me with the history on these, especially the rubberized grip 13mm. PS. I picked up the 11mm t1 as a "buy it now" for $250.00 I understand they are collector items so I thought that was a good price?

October 3, 2003 06:22 PM Forum: Equipment Talk

Starsplitter cast aluminum focuser

Posted By Kurt King
Friends, I am accumulating parts for a couple of 12.5" f/5 reflectors. I ran across Starsplitter Telescopes cast aluminum focusers in 1.25" and 2" formats. Can anyone give me some comments on the quality/usability of these focusers? I am making F/5 mirrors with 2.14" secondaries in 14" ID tubes. Would either the 1.25" or 2" focusers be a good solution in these systems? Thanks very much.

December 28, 2003 05:10 PM Forum: Pictures of Me and My Telescope and........

Tilted Component Telscope(TCT)

Posted By Kurt King
Posted on wrong forum but finally found my prized picture showing 3 precious things listed in order of importance:1) 14 yr. old daughter, Alyssa, 2) 5 ft. Thedoric, and 3) 8" F/20 TCT with plate glass mirrors.

March 31, 2004 08:55 PM Forum: Maksutovs

Meade 7" Corrector Radius

Posted By Kurt King
Friends, do any owners of the Meade 7" Mak know the concave and convex R's of the corrector? Just general numbers within an 1" or so. Many thanks.

March 31, 2004 08:57 PM Forum: Meade

7" Mak Corrector Question

Posted By Kurt King
Friends, do any owners of the Meade 7" Mak know the R's of the corrector. Just need numbers of the concave & convex sides within an inch or so. Thanks!

September 17, 2004 04:36 PM Forum: Eyepieces

UO Ortho- unusual marking

Posted By Kurt King
Hello eyepiece experts, I just added the 9MM UO Ortho(non HD) to my set of 5,7,12.5,18 and 25MM's. The 9MM is the only one that has additional lettering along the top. The unusual letters are
"O.P.S.". Can someone please clarify these letters? Thanks.

February 7, 2005 05:40 AM Forum: Maksutovs

Question for Roland on correctors

Posted By Kurt King
Roland, You stated(can't find to quote) that it is best to generate a Mak corrector from a thick flat piece of quality glass. What are your thoughts on slumping a thinner piece of glass, thus annealing it at the same time? would this less expensive(saving on cost & time) be capable of producing a Mak worthy of your standards?


February 7, 2005 06:07 AM Forum: Maksutovs

Question for Roland on correctors

Posted By Kurt King
Roland, You stated(can't find to quote) that it is best to generate a Mak corrector from a thick flat piece of quality glass. What are your thoughts on slumping a thinner piece of glass, thus annealing it at the same time? would this less expensive(saving on cost & time) be capable of producing a Mak worthy of your standards?

February 17, 2005 11:35 AM Forum: Astro-Physics

Maksutov question for Roland

Posted By Kurt King
Roland, Due to your much appreciated input on why not to use a slumped mak corrector, I have abandoned my 8" Mak project. I was wondering if we amateur glass pushers can, with your help, resurrect the old Maksutov Club. That is, if enough of us are interested and could agree on a particular size and design Mak, could we enlist your help in bulk buying corrector glass and assisting with a nice design? Just testing the waters. Thanks.

Funding Member

Telescopes, Astronomy, Binoculars

Sponsors


View all sponsors

Search