Thanks for the thought, Kyle, however this link doesn't actually cover any procedure for assessing a dobs orthogonality, it just notes the importance of...
Hi Mike, One easy thing you can do is to measure from the top of your secondary cage to the bottom of your mirror box on all four sides. This should give you...
Someone on th is list needs ,who knows more about this than I do, to write a book on this subject. I have seen machines and there are plans in some of the...
Hi all. Nice informative group for dob owners. I've been eeking by on a little 4 1/2" EQ mounted reflector. My recently ordered Starhopper 10" is enroute to...
Hello, I have an Astrosystems 18" Telekit with a Pegasus mirror (f4.3) and feathure touch focuser. I have noticed that even when the scope is well collimated...
Hi Mike, One possibility is that the seeing for that night was poor. When scintillation is high (star twinkling), it is an indication that the seeing is poor...
... Either thermal effects (mirror is not cooled down) or just a bad mirror (every manufacturer has bad days). Do a star test, and see if the star image...
Welcome......don't short the small size. I'd bet some of the views you may get out in the middle of an ocean are unbelievably dark and clear. And you're...
When I get basketballs in the scope, I go to bed. Usually, bad seeing.......not uncommon. The better the seeing conditions, the smaller the stars....til they...
There are many locations that almost always have unsteady seeing so don't write of the scope if you never get sharp images. For instance, I have a friend who...
An update of the Mirror Edge Support Calculator sheet is available at the same address as previously: www.cruxis.com/scope/mirroredgecalculator.htm The...
Thanks all for the replies. The mirror is plenty cooled down as it is always stored in my shed (covered of course with dew chaser plugged in) and also...
When evaluating the seeing conditions, don't forget to check out the location of the jet stream, see http://home.znet.com/aringler/jet.htm If this guy is...
That would make sense. I live in Yorktown Va. Which is almost always under or very near the jetstream. nice little weather site. I will add it to me pre-star...
... Moist is usually good. Seeing is normally worse in the winter because clear skies implies low relative humidity, but relative humidity at lower temps is...
You will be able to see a lot with the 10" light bucket. Especially in your dark sky locations. Nothing to be ashamed of there. Have fun! Dail I know my little...
Mike, Don't know how long you've been using this class of aperture in your area, but from experience, the seeing conditions in your area generally go from very...
Thanks Dave. The measurement you mention of the secondary cage-to-mirror box distance in order to establish a certain measure of orthogonality is an...
Mr Klosterman. ... With all due respect, I think it is a mistaken aproach to exonearate the primary mirror just because it is made by a reputable optician, and...
Hi Mike, Your mirror may not be as cooled down as you think. The glass of the mirror only needs to be a few degrees above ambient to cause problems. Your...
Hi Darryl, If it were me, I would get the existing mirror recoated. I doubt it would cost more than $100 including shipping. Making a mirror, even a small...
Daryl: We can provide a fresh aluminum coating for $40. Contact me at the E-mail below if you would like to discuss. James James Mulherin President/Lead...
... Do both! Since it'll take more than a few days for you to grind a mirror, get the one you have recoated. But don't use having a scope as an excuse to not ...
I have been through this myself - when I was a neophyte at the hobby (after 4 years I was using a 30")... The best thing you can do is to compare views side by...
From what I've heard and my own experience actually looking at different scopes - as well as seeing the same object in different size scopes. The area of a...
A couple years ago, I ran across a telrad decale that sticks to the laminated version of the Sky Atlas 2000. Does anyone know where I could order them from? ...
What's up with the Discovery website. For the last 2 - 3 days my old 'favorites' url for Discovery takes me to some kind of search engine website based on the...
This might be it. Check it out and/or call Jeff Norwood at CCTS. His number is on the website. http://www.cameraconcepts.com/store/p804.html Charlie Starks ...
The new URL for Discovery Telescopes is --- http://www.discoverytelescope.com/ Mike Wolford Spencer IN [Non-text portions of this message have been removed]...
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