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
13119
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...
Welcome Tom (and Bonnie!), The 12.5" PDHQ is a wonderful scope. It's about the biggest scope you can get at F/5 or higher and still keep you feet on the...
Yes you will love the 12.5.I also have own many dobs and the 12.5 pdhq is my favorite scope.It will give you many nights of pleasure.Hope it comes soon.What...
Bob, Bill told me in 7-10 days it would be ready to ship. I asked if that was business days, he said no, 7-10 days. As I've spent much time reading/posting on...
Enter your vote today! A new poll has been created for the Discovery-Dob-Users group: To owners of 15 inch or larger Discovery Dobs, from time of order until...
Discovery-Dob-Users@y...
Mar 18, 2007 2:20 pm
13125
A New Poll to find out average Delivery times for 15inch and larger discovery Dobs Phil...
Sorry about the double posting of the poll, tried to correct the order of the choices and it posted the poll as closed. Re posted the poll, the order of the...
I too recently bought similar scope. Now, I am also looking to upgrade to DSC or goto. What is the best "after market" DSC / goto system for a DOB with plywood...
In Order: 1) Argo Navis 2) Sky Commander 3) JMI (or other label on Tangent-made boxes) Stellar Cat, Dob Driver II, and others are tracking/pointing systems...
I am frustrated by my dealings with Discovery Telescopes. I ordered an 8" F6 PDHQ from Bill at Discovery last October, and it took about a month to deliver it....
John, Why not just drill new holes yourself and rotate the tube until everything lines up? A slight change in the altitude of the focuser wouldn't matter if ...
Hi Don, You're right. I think I will do that. Either that or maybe obtain a new tube from Protostar or something. I'm more upset (by far) about how this seems...
Hi John, Hated reading your story but I'm sure many of us could relate to at least some of it. The quoted delivery times are of course a standard joke now and...
Hello all. Just as a refresher I had ordered the 12.5" PDHQ from Discovery on Jan. 29, 2007. I was told it would be ready to ship in 7- 10 days. I found out...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
