... Hi Bob: I am always yelling at the radio.... Right now I am thumbing through a March 1989 issue of S&T. Including the front and back covers, this issue has...
When Venus is in a phase from half-disc to a crescent, it is quite common for me to notice a slight shading that forms a small semi-circle whose diameter is...
Whatever was causing the marked increase in visible detail in the upper atmosphere about a month ago is now past it would seem - the previous two days I have...
Hi Along with my XT10i I also own a starblast. I think it has excellent optics for it's size. I would like to put it on a solid mount that will track. The...
I need to amend my own post. I meant to say I could spend thousands not can, my wife wife would never let me spend thousands on a mount for the starblast. ...
Unfortunately that is all I ever see also, a featureless white object. Doug ... -- Doug The Truckstop Astronomer [Non-text portions of this message have been...
I actually was able to mount a 6" f/5 on the larger Nexstar SE mount, but it was not steady, although it worked. It would likely carry the 4.5" f/4 easily. I...
I recently got a (free) older laptop PC (Sony Vaio) that only has USB 1 ports. I see that the Orion CCD cameras all require USB 2.0 ports, although the web...
Perhaps a dumb observation, hence question, but when I'm looking at Venus through my Newtonian telescope I see a four point star "effect". I DO see Venus as it...
After many years of being an S&T subscriber, I left during the reign of the last editor. Some of his editorializing being way O.T. and some I found down right...
... Yes, what you are seeing is called diffraction spikes, and it results from the four-vane spider that holds your secondary mirror in place. This is...
Sadly, no. I resubscribed, even with all the stories about them. But it's not better, nor is it worse. I will not be reupping S&T. I will Astronomy, and ATT. ...
Yes, it's caused by the secondary mirror support, the spider. Doug ... -- Doug The Truckstop Astronomer [Non-text portions of this message have been removed]...
Hi: What you are seeing is the diffaction caused by the spider , so you are right. You will also see that effect if you look at Sirus. Bill ... From: ridge_bo ...
Hi all, our Orion 13mm Stratus wide field arrived today so I might as well take responsibility for the typhoon that is building. It is certainly a fair sized...
Hi all, the wind died down, the rain stopped and the clouds sort of cleared off. At least they thinned out and there were times when it was almost clear. At...
Hi all i was hoping for some advice. I ordered and received a single speed CR1 Newt focuser from Moonlite for my XT10 Dob. It really is a work of art....
hi I'm in the process of shopping for a refractor in the 90-100mm range. Some come with a 90 degree diagonal as standard with and an image erect prism as...
... go ... Hi John, Unless you own or know someone with a milling machine, you need to order the universal adaptor. No point buying a Moonlite focuser and then...
... come here to let us know of another ... the review in the Files area of this ... single ... explain ... I ... more about. ... Group. ... maybe ... so ... ...
... No Offense John, but you could have trimmed down and only quoted the parts of the message you were referring too, yourself. Scrolling through 12 pages of...
From: "Garry" <garrybk@...> ... Garry, in my experience, those refractors that come with an image erecting prism do not employ a typical 90 degree star...
Some are purists and suggest that the quality of the image, albeit a mirror image, is better and they are probably right. However, some like me who are star...
Jack Thank you for responding. I'm looking for a refractor that I can take out easily on a work night when I have only an hour or so to spare. I have a...
In previous times, an erecting system for terrestrial viewing used a set of lenses (some light lost, took up some distance in the optical train), or two...
... Like Jack pointed out, they are typically used for terrestrial work where light grasp is less of an issue than astronomy. Common wisdom is that the prisms...
From: "Jim" <Jim.RapidEye@...> ... I think that's especially true nowadays with the higher quality star diagonals that are being used in many telescopes....
... his ... me ... Hi Brian, Same here. Rain, wind, sleet, snow, more wind, fog..... I did manage to get out last night for some lunar viewing. The seeing was...
I have an 8" f/5 starbucket and the mirror has what looks like a film on it that hasn't come off in the areas where I have lightly cleaned it with a surgical...
... film ... cleaned ... is ... I ... starbucket ... One way to tell if it needs re coating is to shine a flashlight through the back of the mirror. You...
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