I am using a 12.5 Dob with an astro video camera. I am finding that an in ordinate amount of time is being spent making slight adjustments in the field of...
With a clean slate, if you wanted to optimize the design for the smallest possible secondary, what would be the basic optical element specs, say with a 32"...
Dear All, I have a 16" F5.5 Dob on a tracking platform in a roll-off roof observatory ( that I use primarily for lunar imaging ). Wind at my site is becoming...
Hi Everyone, I don't know if I am in the right place or not? My first truss tube is only 10'' just wondered if it is a ' Big Dob' it is to me with my dodgy...
Quick question, and pardon me if there's a faq, but I've owned a Discovery 12" for a number of months, as well as encoders and a sky vector dsc setup. What...
Last post talked about "crooked backs". Figured out that wheeling around the 18" Telekit from the trailer to the pad is not the cause. Even lifting the...
Hi all , I have a question. I'm building a newt for my homemade 8inch f8 mirror . Im going to make a coopered wood tube. I need to understand diagonal offset....
Earlier this week, I was looking at the Trapezium with my 10mm Radian at about 220x in my 18" Obsession. Wow! with my new Howie Glatter laser, I clearly saw...
Hi everybody, I another discussion list a question about the perception of colours in DSO has been raised. Some people say they are able to see colours in...
Thanks all for the great comments and info. I do believe the concensus seems to favor a Barlow rather than going to shorter FL, hence shorter eye relief EPs....
Hey all, I have an F5, 12-inch GTO mirror on a homebuilt scope. I keep my scope on my backporch, and despite the fact that I keep it covered, from time to...
i have an 18 in obsession with a right angle finder a telerad and a heater for my eyepieces. what kind of configuration can i make for my dob for dew...
Hi all. I'm new to this group so I thought I would join and take in as much as I could about dobs in general. I currently own a 114mm Newtonian Reflector by...
I am a newbie to big dobs. I now have a 16 inch AstroSky Ed Steven's mirror Dob and want to know what is the best set of tools to help collimate it. I have...
After the set-back with Optical Structures about 5 weeks ago, I have the pleasure to inform you that Mike Lockwood will take on the challenge to produce the...
I've posted a discounted 20" F/5 blem on eBay. This is a nice mirror with a small chip on the front surface... http://tinyurl.com/2n2kgp James James Mulherin ...
My 12.5 truss dob is being used increasingly for astro video observation. My dob is pretty well weighted/balanced, but with extended integration times or a...
Come join us at the 2007 Shingletown Star party from July 9 -16, 2007! Located on an unused airstrip at an altitude of 4,000 feet in Northern California, this...
Thanks so much for taking the time to give me some information. It is all very helpful. I will join a clubl right away. Glad to know that I don't really need...
Hello, I am new to observation and have purchased a Zhumell 8 inch dobsonian telescope. I chose the Dobsonian because I had read that it was very child...
Does any one know how i can roll my own aluminum tube. and make it as good as the pro's? I find that the tubes out there are not to my specs and the ones i...
It would seem that the equipment for serious alt-az imaging is now readily available and affordable, but there is still a software gap in realizing that...
There is some good news in the making for alt-az folk! As the indispensable basis of any serious alt-az imaging, I have been putting forward the issue of...
Members, I posted on cloudy nights equipment forum a similar question but got a rare zero response. Thought someone here might have an idea. I have a 12.5...
