Hi all, this may be opening a can of worms that should not be opened but after nearly a year of reading and hopefully learning I have a general question....
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May 1, 2008 7:41 am
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From: "mljbw2" <mljbw2@...> ... Brian, I can answer as an old timer (50+ years as an amateur astronomer). As is often said, there is no such thing as a...
only real advantages are more aperture per dollar, and no color aberrations. Doug ... From: mljbw2 <mljbw2@...> To: telescopes@yahoogroups.com Sent:...
... Actually, I would say that, for most of us, the apochromatic refractor is the design against which all other telescope designs are measured. There is no...
Geoff, I would hardly ever argue against anything you say, but... I think our perspective is as amateur astronomers considering small telescopes. I think the...
From: "Geoff Gaherty" <geoff@...> ... Actually, I'd have to modify my original reply and agree with Geoff to a point. I have a 6" apochromat and have...
... I think we're talking about two different things. The apochromatic refractor is the standard of _optical perfection_, because of its absence of a central...
... I'm in the same boat as Jack (48 yrs in the hobby). Things have changed a lot over that period, especially the availability of large- aperture telescopes...
I compared my TEC-6 (6" Mak-Cass) to my Starmaster V8 (an 8" Newtonian with a Zambuto mirror) many times. Both were very good performers on planets. I found...
I appreciate your comments, Geoff (and others) . . . but if one can afford a scope with larger-sized, high-quality Newtonian optics, it can be fitted with an...
... While this is true, the view with the Newtonian at full aperture will always beat the view with it stopped down. This has been tried experimentally and...
From: <stargazer_7@...> ... My experience as well, Dave. I too had a 10" f/5.6 that I stopped down to 4", and the contrast was great because of bypassing...
I have a 7" Meade Mak that is excellent on the planets. It will hold its own with anything I've looked through. It may be another OTA to consider in your...
my 8" cape newise (it's close enogh to being a regular newt for this discussion) beats my ETX125 (5" Mak with great optics) hands down on planets when the...
... John? Is your mount the old style CG5 with stamped aluminum legs, or the newer Advanced Series CG5 with tubular steel legs? If the former, you may find...
Geoff, For the content of what you said, you're right on the money. *However* :-) what *I* was doing, was comparing the performance of an APO of the *same...
looking at this logically I would have to say that dark escapes from light at the same speed. So Dark can move at the speed of light as along as it is being...
... Jack, I agree with all that you said. However, to clarify myself (as I did with Geoff) . . . Yes -- aperture wins, as long as the optical quality is good....
Dave, I guess we are on the same page then. I would be interested to see a side-by-side comparison between a large Newtonian stopped down to 6" and a 6" apo....
All telescope designs (at least, all the ones that are actually used) are equally good as designs. They are, however, different engineering solutions, each...
Hi all: In Dickinson's 1991 edition of The Backyard Astronomer's Guide, page 94, Myth #8 of Ten Myths About Telescopes and Observing, "A Telescope's Central ...
... you ... Actually, i have the newest version with the beter legs. I hear what you are saying though, i have been told that this OTA would be pushing the...
... page 94, ... Telescope's Central ... is a bit ... is "significantly". ... increase in ... various ... to me ... discern no ... desirable on ... it, is that...
... This condition never happens in the real world. For example, at the same price point a Mak may have better optics than a scope of another design since its...
... As Richard and I know from personal experience, having spent a pleasant evening last spring together doing a side-by-side comparison of his Tele Vue 85 and...
Jack I have been following this thread with great interest. I have a mask for a 10" Newtonian but have never used it, did not see much point in doing so....
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