I have an ETX-80 and fashioned a two piece mount for a DIY RDF (Modified Dasiy BB gun sight). The base part of the mount that is attached to the scope is a...
Woody, Works great! I mounted it up on my old beat up 125 OTA with the bent focuser shaft. The focuser motot slows a bit when it come to the high point on the...
http://tech.ph.groups.yahoo.com/group/ETXASTRO/photos/browse/7315 Here are the pics ... (Modified Dasiy BB gun sight). The base part of the mount that is ...
All the holes line up. All, I've done is look through it briefly after i mounted it. Havn't got to field test it under the stars yet due to the clouds....
Mark, Very clever! The Daisey and every RDF I've seen (except Galileo's Mar's Eye) uses an 10-11mm wide dovetail. Sections of this dovetail used to be...
With so many filters available and some being rather expensive, I can only afford to get just one right now. I have a good solar and moon filter. And, while I...
Sky glow blocking filter if your location has light pollution. Orion sells broadband ones in two sizes for $70 and $85. More severe light problems may require...
I asked the same question of my local astronomy store. I bought a Lumicon UHC filter, specifically for nebulas. The Great Orion Nebula is SPECTACULAR with this...
Thanks for the responses guys. Michael Rudy <mrcapk9_groups@...> wrote: I asked the same question of my local astronomy store. I bought a Lumicon UHC...
I have read several articles on Basic Astronomy and have a question I can't find anywhere. When one talks about Object Orientation through the eyepiece, when ...
Zenith is straight overhead...straight up! Polaris is the north star, you'll become much more familiar with this as you gain more experience. "Polaris is...
I went ahead and bought the ETX-105 AT. Although I haven't pointed it at the sky yet, I set it up, trained the drives, and installed the electric focuser (the...
... They are talking about "north"... the direction towards polaris. So if you're looking at an object just rising in the east, "north" will be in the 10 or 11...
... Yes... a cross/sanity check is to aim at the moon... the field of view is roughly "two moons", and tan(0.92)*238,712 miles yields 3833 miles, roughly twice...
Thanks Dick. So, to move these calculations and units of measure to planetary viewing, if Mars will be about 16 arc seconds this month, that means its:...
Thanks to all for their answers. I should have said I am not new to astronomy nor telescopes. I do know the difference between Polar North and Zenith, I just...
... Probably... and that's why you start buying Barlows (which increase the magnification/decrease the effective focal length of your current eyepiece(s)) and...
Okay, I'm still anticipating that magical moment of actually viewing a celestial body in all its splendor. Last night I got out for about an hour in the...
... If you know where "true north" is, you can perform a "one star" alignment which may get you closer faster to "there" than other methods. Also, for the best...
You're the best, Dick. The fit of the eyepiece with a filter just seems wierd in my ETX 105. If I tighten down the set screw or if the scope is near the...
How far off is "way off"? DO NOT expect alignment stars to be in the eyepiece, centered in the finder, or even _in_ the finder. Just center them up and keep on...
It was so far off, I could tell with the naked eye that I was missing the stars by 15 degrees or more. Plus, my finderscope was in three pieces. However, last...
... <comingdownthemountain@...> wrote: ... Congratulations! ... It's not -desirable-. "Normal" may vary with brand of filter. If the filter is firmly screwed...
Well, isn't it firmly seated when you tighten the setscrew? If so, I would not worry about it. Peace, Rod Mollise Author of Choosing and Using a Schmidt...
Tightening the set screw tips the eyepiece over at an angle so its "cock-eyed" in the holder. This is the case with all five of my filters and all four of my...
Yes, that sounds about right. Mars can be a very disappointing object in any scope. Percival Lowell spent a lot of time at his 24" refractor and hallucinated...
Speaking of Mars, when I saw it for the first time the other night, it was so bright that it basically looked like a big star. I didn't try my filters for...
I think your question really has to do with the manner in which the telescope's image is presented at the eyepiece. Refractor and Cassegrain telescopes will...
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