I believe the star test is the ultimate test. Find a copy of Dr. Suiter's book "Star Testing Astronomical Telescopes". http://www.willbell.com/TM/tm5.htm And...
I built a test bed telescope to check the mirror. http://www.telesc0pe.com/t5b.htm Will a star test (when I can do a better one) tell me all I need to know...
Grinding is not recoating so star test it and find out how well it performs. The company who recoats the mirror will take off the old coating and shipping it...
How bad does a mirror need to be for a recoat to make a difference in the views it shows? I purchased a 10" f/4.5 mirror cheap (seller said "may need some...
In a message dated 12/23/2009 9:36:27 PM Pacific Standard Time, ... Randy - thanks for the clarifications; I am sure we are in general agreement on most of...
... I don't mean a tight fit that puts strain on the optics. Tight fit with a delrin ring that has minimum contact means that the mirror will not move side to...
In a message dated 12/23/2009 12:51:27 AM Pacific Standard Time, ... Peter/Randy - I suggest great caution in this regard. I submit that in fact what is...
... It is an equatorial fork not a dob. It was built with long before computer control or the popularity of the Dod. So the only way to make a scope track was...
Thank's Randy. You did not mention if your 22" scope was mounted equatorially, but I assume it was a dob or other alt-az mount. This is a very interesting...
Peter, I has a similar problem with a 22" telescope. The mirror is 2 5/8" thick. I have tried many ways of supporting the mirrors from the edge with little...
Hello, A link to my Facebook web page is given below. Includes the 88 constellations - with a fairly extensive description of each constellation + lots of...
Spectaculae image! ... Hi, I have been tweaking the performance of my first and newly self-built 16 inch Newtonian scope. Last night was gloriously clear so I...
Hi, I have been tweaking the performance of my first and newly self-built 16 inch Newtonian scope. Last night was gloriously clear so I decided to take a few...
Ignore this message! My email account has been hacked somehow. I am just fine, sitting here in our Hawaii home. More later, as I figure this all out and deal...
I'm sorry for this odd request because it might get to you too urgent but it's because of the situation of things right now, i'm stuck in Wales, United Kingdom...
Top Ten Ways to Improve a Newtonian can be found here: http://home.digitalexp.com/~suiterhr/TM/Topten.htm#07 Though I have not yet tried it myself, baffling is...
I have been using a 16-inch Newtonian for the past ten years or so. I installed light baffles in the tube itself - about six of them - to try and improve the...
Hi folks I was wondering what the opinions are on the use of baffels in a Newtonian tube are they a help to improve contrast what about the thermals that are...
... Thank you Mick, This is really helpful. I will start with these documents as you suggest. I'm not in a hurry. I'm sure it will take 4 - 6 months to have...
Peter - I had a little time today so I gathered up some info for you that might help in your PLOP cell design for your 24 inch mirror: First, the URLs below...
In a message dated 11/18/2009 8:26:17 PM Pacific Standard Time, ... Peter - a picture being worth 1K words (according to legend), I have placed two pictures...
In a message dated 11/18/2009 8:03:54 PM Pacific Standard Time, ... Tim - thanks for the encouragement on the Jupiter images. These images are most assuredly...
... Thank you for the sobering assessment. Alas, I think you are right. So looking back to the "standard cell", how would one hold a 2-foot mirror laterally...
retty impressive if you ask me. Are these individual shots or are they a stack? Tim ________________________________ From: "mhholl@..." <mhholl@...> To:...
Group - I have placed three recent images of Jupiter (made using my homebuilt 10 inch f/6 Newt) in the Photos section, Mick Hollimon folder. These images...
In a message dated 11/14/2009 8:55:30 AM Pacific Standard Time, ... Peter - I finally got a chance to examine the sketch of the proposed 4-contact sling...
Peter, Rather than a full thickness mirror, consider a honeycombed mirror that weighs 60% less and is less demanding to properly mount. Had I realized this...
Hi Mick, I appreciate the insights on the hazards of slings, however I have not yet given up on the idea of a specialized sling system for an equatorially...
In a message dated 11/11/2009 7:20:05 AM Pacific Standard Time, ... Peter - I can certainly understand the concern about fully supporting a large mirror in...
Thanks for the responses, Mick; I would absolutely use software (Plop) to design the cell support points, but the edge supports (and potentially forward...
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