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telescopes@yahoogroup...
Jan 1, 2007 11:42 am
125455
Interesting point. I guess my approach to scopes is wholistic and a Unitron is more than just its parts - it is the quality of the mechanics and the memory of...
... A few years back I purchased a Celestron 102mm (4") F5 "Spotting Scope" from Adorama for $199.95 + shipping. While there is visible "false color", the...
Happy New Year and clear skies to all! Tele Vue's "Top Hat" adapter also is taller than most, requiring the nosepiece of an eyepiece to be around 1.5" long...
... Malcom, TeleVue has a 2" Eyepiece Barrel Extension (P/N EBX-2120) that will do exactly what you want. John Switzer Centerpoint, IN 15" Obsession #1259...
You might also want to check out Matt Tarlack's review in the Links/Equipment Reviews/Barlows. See the left hand side of the screen for this series of links....
Hi all, Hopefully, someone out there has seen something like what I'm encountering and can offer guidance. I'm the initial owner of a less- than-year-old...
Phil, Thanks for the heads up. I do most of my observing in the early morning hours so I've just started on the Spring season and will be coming up on those 2...
Hi Bill, I have an MN61/Orion Argonaut 6" Mak Newt. Here is how I collimate mine. See Message #115648. The pocedure worked very well for me. I don't know how...
... Wow Phil - now you have a dandy little checklist and all! Great Idea!!! Wish I had that when I made my run through the book. That number 5 guy on your...
Malcolm, You can get the EPE2 2" filter thread eyepiece extension from ScopeStuff and screw that into the 2" to 1-1/4" adapter to give you an extra 1" of...
... From: Frank Russello To: telescopes@yahoogroups.com Sent: Monday, January 01, 2007 7:17 PM Subject: [Telescopes] Re: Collimating a Mak Newt Hi Bill, I have...
Well, it's time once again for my annual review of my astronomical activities. 2006 was another year that seemed filled with clouds, yet I managed to observe ...
Frank, thanks for your observations. You forced me to go back and find a handful of small things that are likely my problem. ... flat ... like any ... special...
I have a spare Meade finder with an interesting property - the focal plane can be made coincident with the backplate when the eyepiece is unscrewed. This means...
... Might depend on what you intend to use the artificianl star for. I can think of two uses for which you might have trouble: lining up the finder and doing...
Hi, After reading about the superior quality of custom ground mirrors versus what one gets from mass produced mirrors, like Orion and Meade,makes me wonder if...
... mirrors ... Does ... Anything is possible,but on a lower cost dob I don,t think its worth the financial outlay. Its like this,these scopes are built to a...
It is clear that making a pinhole sufficiently small is not going to work. Therefore I did the following. I tore a piece of aluminum foil - this leaves tiny...
Confirmed this works optically - try this experiment 1) Dredge up some convex lens and measure its focal length F 2) Hand hold it a distance F in front of,...
Initial tests show that you need an exceedingly tiny pinhole and correspondingly bright light. A garden variety needle-in-foil pinhole produces an artificial...
Parallax is accounted for because rays emerge parallel from front of finder if pinhole is in the focal plane from object at infinity. Don't need distance to...
... A misunderstanding here: I meant that pointing your telescope at your artificial star and then adjusting your finder so that it too points at the...
Oh no! The finder is just convenient to use because it has a plate exactly in the focal plane of the objective, to mount a target on. You could rig up a paper...
... mirrors ... Does ... I think this is a common practice and Swayze Optics will test your mirror and make a recommendation on refiguring. Swayze has a great...
Is there a problem with your mirror? The mass-produced mirrors, especially the GSO, seem to be getting better. My 10" has a full- thickness pyrex primary. If...
I am reassembling my secondary cell and spider. There is steel disk that the 3 adjustment screws bear against. It has 3 "dimples" 120 degrees apart. Mine was...
When the screw ends are in the dimples, they prevent the secondary holder rotating out of line with the focuser when you loosen the screws slightly to adjust...
Gregg, Do you have a similar cell holder (GSO) that you are basing this on? I double-checked that and the screws can't go into the dimples - the radius of the...
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