Hi group, Maybe a bit OT, but I was wondering if anyone had a source for a circular ground mat to put under your telescope to make it easier to find those lens...
Tim, I'll assume that I fall into the third category of your salutation. :-) Let me answer your question with a question: do any/all of your eyepieces show...
... It's wrong. I've assembled and tested two of these scopes myself, and they're nowhere near that heavy. I'm just surprised S&T would publish something so ...
... Yes. Even at f/22, a 25cm achromat will have significant chromatic aberration. It would have to be f/50 to be essentially free of chromatic aberration....
... Alvin ... laws ... However, ... stable ... Rosse, ... would ... Carter, I think you are confused. It is generally accepted that any achromat over f/20...
... And I've just checked the specs on the G.S. (Orion, circa 2001) XT10: Weight: 57.6 lbs (base 22.6lbs, tube 35.0 lbs.) The point is not that the original...
... you ... seen ... telescopes ... case. ... It ... <tnicholson2@c...> ... out ... in ... Tim, I think Phil has hit it on the head with maybe collimation...
... For me, a Paracorr is definitely in the "try before you buy" category. I got mine to solve a particular problem: obvious coma and/or field curvature with...
The test report is on the Hardin scope, which is analyzed in some detail, not referring to the comparison chart. Ed ... they're ... is ... the ... to ... ...
In a message dated 4/1/04 7:23:24 AM Eastern Standard Time, geoff@... writes: << > The instrument I favor for observation is a refractor with an Alvin ...
Same as the Canadian Dollar Conversion. It takes more Canadian pounds than US....
Gary Hand
astroguy@...
Apr 1, 2004 2:13 pm
98668
You are very observant and correct. The S&T copy submission date was 2 days before the Celestron Dobs were introduced at the PMA show and no advance pictures...
Gary Hand
astroguy@...
Apr 1, 2004 2:14 pm
98669
... Don't laugh: One of the subcontractors for MOST, Canada's "humble" space telescope, borrowed my Orion SkyView Deluxe mount for six months to help with ...
Dust in the Tube Wasn't that Kansas? Bobby Rice ... Dust in the Tube and Kansas makes me think of tornadoes, which makes me think of wind, Dust in the Wind,...
... Geoff hit it on the head - go to a star party and borrow one (they are pretty common). Put it in and see if you can tell a difference. From my experience,...
Okay, you have a 10" f22 Clark refractor, and you want to put a minus violet filter on it? Do you see violet fringes on stars or the moon? If not, it probably...
Anyone some experience with Televues powermates? Is it a good idea to buy an 4x powermate for an f/10 reflector for planetary astronomy (visual&ccd)? Robert...
Powermates are excellent performers, but the 4x is designed more for short focal length refractors, not f/10 reflectors. For that telescope, I certainly...
Hi Tim, I echo the sentiments of the other replies here; you may or may not find the improvement noticeable. I use mine on a 10" f4.8 and it _does_ make a...
I was under the (possibly mistaken) impression that this activity on Io was first discovered by one of the first Jupiter probes. Has anyone on this forum...
... Hi Tim, This topic was just discussed on another group. I don't know if I'm a distinguished member but here's my take on the Paracorr: I hadn't ever...
Simon, What is the weight of the Paracorr and do you think it would produce a balance problem on an Orion XT10? Mike Casey Pasadena CA XT10 ... [snip] ... the...
Hi, all! I'll be traveling down to Williamsburg Virginia over this weekend. I've never been in that area, so, I have NO idea what the skies are like, as far...
As I slink off with hung head and tail tucked between legs, I am consoled that at least a few others were taken in also, just judging by the few semi-serious...
For those that are considering buying one of the new Celestron Dobs: To the extent that these exhibit many of the same features that the earlier G.S. Dobs...
