Has any one done the modification that converts a split tube to a partial truss setup? I bought such a scope. It appears that it is now longer than f5. I...
If it started out as f/5 it still is, unless it’s a different primary mirror. Assuming the scope comes to focus you can estimate the focal length pretty...
Thanks Lou. I had forgotten the fact about the mirror. I measured the focal length and it comes out to f/5 or very close. ... focal length ... primary to ... ...
The mirror cell in my 12.5" PDHQ split tube consists essentially of 3 lobes or vanes, each with a metal clip at the end to hold the mirror. The mirror rests on...
... Jerel, both of my discovery pdhqs, 12.5 and 17.5, have had the mirrors glued to the cell. For a closed tube scope it's hard for me to imagine doing it any...
Chris, What I did for my 17.5" was to leave the clip at 90°, put a piece of Saran wrap against the mirror, and squirt some silicone between the clip and ...
... Welcome Johan, Discovery optics have been and I assume still are consistantly excellent. Use the search function to find many threads discussing all ...
Anybody been in contact with Bill recently? After getting my new 24" scope with problems he seems to have vanished. I tried numerous voice and e-mail messages,...
Hello Tim, I talked to him 3 days ago: I called, left a message and he called 2 hours later. Teh next day I sent him an email for some questions... Got promply...
Hello Johan, if I were to buy a telescope from Discovery, I would have them put on the setting circles sensors and buy a Argo Navis locater. I have bought the...
Hi Johan, I suggest you go to http://www.cloudynights.com/index.php There is a review of the 17.5 f/5 split tube as well as more discussions on the f/4.1 and...
... From: Discovery-Dob-Users@yahoogroups.com [mailto:Discovery-Dob-Users@yahoogroups.com] On Behalf Of lhlousek Sent: Thursday, October 04, 2007 9:28 AM To:...
Hi, I'm having pretty much the same problem. I sent two mails to Mr. Larsen, one a few days back and one yesterday and I haven't received any response as yet....
Hi Akarsh, I understand your uneasiness, and I want you to focus on the different aspects of this company. If you really want to understand astronomy, then go...
Hello Arkash, I guess you had a clue the delivery time is longer than 2 months. This is what I found out before I placed my order: 1)all orders are delivered,...
Hi ... I didn't really understand what exactly you meant by the above. I understand that Discovery's mirrors are considered to be some of the best in the...
Hi Akarsh, Discovery is terrible on delivery times, You will find delivery will be allot longer than he qouted you, so you still may have a wait ahead of you....
Johan, As I said, I have left voice messages and sent many e-mails. He was in contact with me a number of times when my scope was nearing completion and was...
Thanks! That's all I wanted - the confidence that they're going to give me the scope - no matter how late it arrives. Yeah, I learnt from this group and other...
I emailed Terry Ostahowski and he got back to me in a couple of days. What a nice gentleman! Here is his advice for mounting the mirror using silicon: Before...
Hi, any help is appreciated on this issue... I've got a 17.5" Discovery Truss Dob, very pleased with it, but would like to install some kind of filter slide....
I do not have the same size of Discovery, but I can tell you to be sure of the measurements of the various focusers. If you aren't replacing with the same...
I also have a 17.5 TD Discovery and have the Astrocrumb filter slide. Yes, I opted for the surgery, by installing a new board on the UTA moving the focuser...
Hi I sent four mails to Bill Larsen in the past one week's time asking him for a revised date of completion and the current status of the scope. I wish that...
... Akarsh I have no specific information but this pattern of customer service behavior has been noted quite a few times in the past. Bill can be very...
Hi Bill finally replied. Thanks for the support. I've attached the mail below... do comment on the new schedule. He says 3 weeks more, but I think I'll add...
Ah, the old optics-back-from-coating line. Everyone gets that one. Seven weeks may or may not be optimistic. -- Dave Read my latest astronomy column! ...
Hello, I AM SEEKING A USED DISCOVERY 17.5 - 20" DOB. Prefer a truss design,,, but will consider a PDHQ tube as well. Optics must be excellent. If you are...
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