... The North America Nebula is a very difficult object to see. It requires a very dark sky, excellent transparency, and a wide field of view. My best views...
Ever wonder whether your sky is as good or bad as you think it is? Wonder how far you might have to drive to do better? This might give you some idea. It has...
I have an Orion SVP 100mm f6 refractor which exhibits astigmatism to the extent that it will not split the Lyra quad. I have read somewhere that astigmatism...
Frank My SVP f8 120 had a 'pinched' objective. I made an optical wrench from a thin slat of wood with two small nails spaced and filed to fit the objective...
Are you trying to mount both at once, or one at a time? Orion sells tube rings in sizes that should fit the scopes, and dovetails for the Sirius mount. Wayne...
Yes I want to mount a telescope and one to guide for imaging purposes. What parts do I need to do this? NS ... tube rings in sizes that should fit the scopes,...
I'm afraid I can't help with getting the two mated together. You will have to find someone else that has actually done it to guide you in that. I do know that...
David, I did a quick search and did not find an explanation of the Vixen style lens cell, but I removed the press-on dew shield and loosened the retaining...
Hope they figured the mirror right on this one. 2008/10/9 Franciszek Cesarski <tincanandstring@...> ... [Non-text portions of this message have been...
... The experimenting I did with my Orion 80mm f/5 achromat indicated that thee is an optimum positition for the retaining ring. Too tight, and you get...
... Too early in the morning: "thee is an optimum positition" should read "there is an optimum position." I found backing the retaining ring off a quarter...
Well, at least a trip into space would not be necessary to fix this one if it needed it. Doesn't that mount look a little small to handle a 347 pound OTA?...
Frank, The cell seems to have changed some the older cell did not have the three screws. Call Orion, they sent information on adjusting the cell to Tom Trusock...
David, I have been involved in long-term high-tech projects that have gone horribly wrong. Usually some low-level guy will discover something like that and no...
Just kidding around the scope is probable excellent. Perkin Elmer had a fine reputation until they made one mistake and that killed them. Wish I had that kind...
Geoff The older Vixen 102 f/8.8 Fluorite sold by Celestron had an adjustable lens cell. By the time Orion got the Vixen line they no longer had adjustable...
... This past Thursday one of my astronomy pals and I setup for a couple hours of viewing despite the presence of a half illuminated waxing moon. Just a few...
... <lloyd.black@...> wrote: I have the Hyperion 8 mm, 17 mm, and 24 mm EPs and think they are a tremendous value. I agree with the assessment given, but apart...
... I've also been collecting Hyperions.. I have the 8, 13, 17, & 24mm, and absolutely love them. I had the opportunity at a star party this summer to compare...
... Hi David, I have the full set of fixed Baader Hyperions (3.5mm to 24 mm) the Baader Hyperion 8-24 zoom and a 31mm Badder Hyperion Aspheric. They work very...
OK, I need a little help here. I want a little more aperture and feel that a Dob would give me the most for my money. An Intelliscope COL XT8 would fit into my...
... A good friend of mine has a Parks 10" Newtonian, and it is an excellent scope. I myself have a Cave 8" f/7, the ancestor of the Parks scopes, and it is...
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