... buying a ... back 3 ... Joe, Not sure what Bill meant by "better now than back 3 years ago." since almost all who have been posting on this site for the...
Chris, He mentioned to me that they were using better inferometry null tests. Oh, I agree with the quality (IMO) but wanted to check in case. I do know that...
I ordered my 17.5 inch split tube back in April 2006 through a local discovery dealer here in Australia, the dealer has two on order, mine and someone else's...
Hi Phil, I know your pain... I've been waiting 9 months (March 2006) on a 12.5" f/6 split tube. When I ordered, Bill said he had a f/6 mirror in stock & it...
Hello everyone. I recently bought a used Discovery split-tube 16-inch F/4.5 on Astromart. I believe the mirror was made by Meade. Anyway, I absolutely love the...
Well Discovery out of the blue finally answered Matt, Discovery's agent here in australia, "Dear Matthew: "We apologize for the delay but we are getting close...
Thats good news Phil. Just remember that they can "two week" you to death. So, don't be too disappointed if that date slips. Will be rooting for you. I just...
I do not have the experience you require, but I'm sure it's possible. I do have a Discovery and Starmaster truss scope with a Sky Commander set up. The Sky...
Interesting to see how long it takes to make and deliver dobs. Discovery was 1 of 2 choices. I opt for a 14" tscope - mostly just one guy making them....
... I built a pair for my 17.5 pdhq. They are definately home made and fashioned from concept and looking at pictures--no plans. They are pictured on this site...
Hello, Thanks for the response. Actually, that's my 15" PDHQ in the photo section under Bill's 15" in Vegas. Or, I should say was..... I sold it a little while...
Hi all, I'm looking for some good sources of mirror cells. I've lived with the poor-fitting cell that came with my 12.5" PDHQ long enough. Each of the 3 legs...
I once bought a UO mirror cell for my 8" Discovery but returned to the original glued Discovery design with some DIY modifications. The UO unit didn't seem to...
Thanks Bill, My Discovery cell doesn't look at all like yours. The three arms are 3/4" tube steel, not a triangle like yours. I like your modifications. Glad...
People, I hate to be Johnny-come-lately, but what are the PDHQ tubes made of? Does Discovery ship internationally? The Discovery mirrors have a good reputation...
Dean, the tubes are sonotubes and yes you will need a paracorr to cover for the curvature of the mirror. I have a 17.5 inch PDHQ and if I'm looking through the...
... of? ... They ... Dean, Discovery produces great mirrors, some of the best. So, if I interpret your question correctly the chances are good that the whole...
I agree with Chris. I have the 12.5" PDHQ and the edges are as good as the center. I'm also in the camp that I don't need a Paracorr at F/5. It really is a...
I have one of the 'old' 14" f/4.5 PDHQ's (2000) and, although I have a Paracorr, I rarely use it. I would suggest borrowing one at a star party and trying it ...
My highest power eyepiece has a 7mm field stop (a 5mm T6 Nagler). The coma-free field of a newtonian is 0.0007" x the f/ratio cubed. Since my scope was a...
Just from my experience of looking in different aperatures for the same object. From 8 - 10 " scope is 50% more power and more detail can be seen, but it's...
If you want to gain a full magnitude (5th root of 100) between apertures, the ratio is 2.512:1, meaning 8", 12.7", 20". In a dark sky, Dickinson's magnitude...
I've been out of observing for a while and this is a basic question. How good is a 10" f/5 on planetary as opposed to an 8" f/6. I've been using an old Meade...
A well-made 10" f/5 will do fine on the planets. But, coma will be more of an issue if/when the planet is anywhere other than the very center of the field of...
The time has come for me to move. I hate to depart with my huge scope, but I have no choice. It is 3 years old and has served me well. If anyone is interested,...
David, Diane's Carlst...
Starman@...
Feb 22, 2007 11:30 pm
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My name is Tom Andrews. I ordered a 12.5" PDHQ almost a month ago. I have been spending much time on Cloudy Nights website and someone mentioned Yahoo groups...
Hello Tom and Bonnie and Welcome!!! You are going to love your 12.5"!!! I have owned a 12.5" PDHQ, a 15" PDHQ and currently a 20" PDHQ and I have really...
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