James This is truly amazing. I also really like the truss design. I makes me wonder though, where the practicle limit of aperture for visual use is, given the...
Joe, I can say with our 30" here in AZ we routinely CRUISE at 250x... then if the seeing permits, and it usually does, we go up to about 400x... it's not that...
Gary: OK, Your really bugging me now...remeber I'm in NYC (LOL) But seriously, I have been considering a trip out to your facility (My last time in AZ I...
... Seeing is much less of a factor for DSOs, since the eye doesn't see detail nealy as well at low light levels. It's not uncommon to hear reports on this...
This is an awesome construction indeed! But, could it be getting beyond the "reasonable limits" of the Dobsonian design!? I mean, how many professional scopes...
Don't get me wrong, Large Dobs are great (Mine is a 20"), but I think the primary goal of the design was meant to be for realistic and practical use!! Hi Mike;...
Mike: This is NOT a portable instrument. It will be permanently installed in a roll off roof observatory. The observer will ride in an electric scissor lift to...
Hi Joe, Like most other places around the US (world!?) it's not been "normal" for a while and we have experienced fewer cloud free nights... that stated it's...
Very much agreed... although I often go to 500 and a few times 800x on DSO's planets are still not all that great, at least in my scope. And what is acceptable...
Thanks Gary I may be planning a trip out to you guys in the fall. I know things are still hit and miss. As I mentioned, I was out in Benson last June and had...
Hi All, Is there a web site that would have a night satellite image of just Ohio? I am trying to scout out some dark sites for this year. Already know of a few...
If I remember what I've read about the original Dobsoian design right, the idea was to be able to make a usable reflector telescope using commonly available...
Dave, ... Have you checked out the light pollution map you can get off the Clear Sky Clock? It took me a little while to figure out how to do it, but you can...
Bruce: My first scope was an 8" Sono-tube Dob. I still have pictures of it. At the time it was all I could afford and still get some aperture. I made the ...
Dave, While this is not a satellite image, nothing beats Attilla Danko's Clear Sky Charts. I've provided a link to a map of Ohio, click on balloon closest to...
I don't want to be a pest, but isn't it time for another picture change, at the top of the website? IIRC, by a poll, it was decided to be changed quarterly. ...
Ok James, Thanks for clarifying! Still, for a 48" if it was me, I would have preferred an RC-style, or even classical cassegrain, to get the eyepiece down to...
Ok. Let pick a new picture for the bigdob main page with a poll. First copy pictures you'd like to nominate to appear on the mainpage to this directory: ...
I think that is exactly what you should do. For me I can't wait to get out to Jim's place and ride the lift. Mike F ... From: bigdob@yahoogroups.com...
Hi All, Thanks for the info Steve & Mike. Steve can you give me a little more info on how you overlay the multi-colored picture over the actual map? Thanks, ...
Mike: But that would drive to price up quite a bit. A 48" Cass on an equatorial for would be north of $599K. The Dob is still the biggest bank for the buck, ...
I should really write that up as a faq. How to overlay lightpollution maps on a road map. ... 1. goto earth.google.com and download a copy of google earth....
Attilla, ... Yes. I looked for instructions, but didn't find any. Thanks for the instructions you just provided. I did it the brute force way by pasting in...
just be aware that it's not overly accurate - at least it is not for my site. It shows us as marginal (don't remember the color but it's not flattering)...
16" is a fantastic size - you'll have a great time with it I am sure and it will provide a life time of views. Never been to Spruce Knob nor Cherry Springs but...
Yup, accuracy can be a problem. The north-american lighpollution map dosn't consider the site's elevation. (For some reason, Cinzano and Falci include...
Naturally, I've nominated James Mulherin's photo of the new 48 inch OMI Dob. Are there any bigger? [;)] Dave Reese Obsession 25" f/5 #1748/Galaxy/SC/AN/WL232...
I personally don't think it matters, whose telescope is up there. Just so it changes quarterly. I would actually prefer to be surprised, than knowing before...
... I doubt it was intended to be. Did you see the thickness of the metal plates it's made out of, in the construction photos? ... 15 feet, according to the...
Cost is certainly a factor. Every design has tradeoffs. His choice was for a visual deep-sky light bucket, I guess. Unfortunately Dobs are not too practical...
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