The Badder company sells some real good quality sheets of Solar filter material, you make your own filter to fit your scope. That is for seeing sun Spots only....
Hello Chris : Back about 6 years when I ordered my 14" Tscope I also odered a 2" Holographic Laser collimator, It's a work of art, and I am still using the...
Since you are pointing it into the eyepiece of the telescope, I would focus the scope first and if you are taking pics of the moon or planets, try autofocus....
hello group back to the subject of collimation. I have obtained a laser collimator now (HOTECH SCA LASER COLLIMATOR)previously i made a center mark on the...
thank you very much, it cant be clean then this, i was thinking of complicated ways to do it, while it's easier then i thought, ... From: Christopher...
My Point and shoot camera does not have auto -focus on it, But my old VCR cam recorder does. I will try out your suggestions and get back to you! Thank-you...
Thinking of truck axles in Texereau and pondering alternatives while sitting at a desk during lunch time yesterday inspired me to stop by the trash on the way...
Very cool looking Frank! The Scope chair looks good! Just the other day i was looking at the extra tripod stand I have at home and I had an extra dob laying...
Thanks, Oscar. I chose the chair because I need to sit when I observe, so I could not use one of the tripods I have handy, like the one on this page which I...
I believe that ozone is effectively transparent. The Moon is mostly gray because that is the color of the rock and dust there. The yellow color when it is...
The Ozone layer is a good absorber of UV not of visible light. The ozone layer is essentially transparent to visible light so, the color of objects in the sky...
Hello everyone I am new to this group so this is my first post. I would like to know what the group members think of Parallax Newtonian telescopes they seem to...
Welcome, Pat. I had the same issue on my new-to-me 10" Discovery-built Orion PDSE Dob. I had changed out the focuser from the abysmally slow helical to an R&P...
Thanks Frank for the very informative reply I like the idea of foam to act as baffels I have about 15 mm. to work with so I think it would work, cutting the...
Sorry, can't help you there, I'm a hammer and tongs (actually power saw) kind of guy. It seems that you have more resources for simple metal work like that in...
... Yes 15mm is all I have to play with the mirror is 150mm O. D. OF tube is 167mm so alowing 2mm for tube thickness 15mm is all I am left with or possible...
Hello, What please is the formula for determining the length of the major axis of a secondary mirror? I need to find the exact center of my secondary mirror...
In a message dated 10/22/2009 2:56:45 AM Pacific Daylight Time, ... John - the major axis of an ellipse is square-root-of-2 (approx. 1.414) times the minor...
Mick, I have a big smile on my face! Thank you for the formula. I can now better proceed with the assembly of my home made scope. John ... From: mhholl@......
In a message dated 10/22/2009 3:24:53 PM Pacific Daylight Time, ... John - glad to be of help. Mick Hollimon 22 Oct 09 6:10 PM PDT USA [Non-text portions of...
Mick, Thanks for the clarification. Cutting a cylinder 45 degrees is what I had in mind for my secondary holder. Best regards, John ... From: mhholl@......
Hi all, My first posting to this group. I was interested in the opinion of others with respect to the best mirror cell design for a large, fast(f/3-4)...
In a message dated 11/5/2009 10:05:29 PM Pacific Standard Time, ... Assuming the "large, fast" Newt mirror is also thin (less than 6/1 width/thickness ratio),...
Peter, Using silicone glue "blobs" around 1" in diameter on each of the 27 flotation points of a mirror cell should properly hold a 24" mirror on an equatorial...
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