Bud, I'm pleased you understand what I'm banging on about. If you take a look at this website, and read my pdf, you may feel sufficiently inspired to buy a kit...
Alan, etc.: I purchased 2 of those Gallileo Scopes as soon as they were offered. When the first one arrived I brought it to a Public Outreach session here on...
... Don't confuse Bud for Bud. I do have a example of Prof. Mooers' telescope kit. It doesn't quite meet your requirements of duplicating Galileo's Old...
... Bud, I am pretty sure Chris knew who he was talking too! ... I'm the other Bud, the one who knows it is "have an example" rather than "have a example!" ;^)...
You could always stop the OG to 38mm. That's about as close as you're going to get with modern lenses. The lenses are good, but not excellent. You would have...
Chris, I guess we disagree about a lot of things here. You wrote IYA2009 was supposed to teach people about Galileo's discoveries, not merely tell people about...
When I was in 6th grade, I experimented with lenses. I was not aware of Galileo's telescope or how it worked or what kind of lenses were required to produce an...
... A positive eyepiece scope has lots of eyerelief, but image is upside down. One using a negative lens (like the Galileo scope) has zero eye relief. Rolando...
... Wouldn't a telescope of that day have been used almost exclusively for terrestrial viewing, and as such have wanted, as you mentioned, only the erect...
... A telescope of that day? I thought Galileo had the only one in his city/country. And he built it himself, for the purpose of exploring the sky. He didn't...
The reason Galileo directed his telescopes to the heavens was to obtain observational evidence to support his belief in the Copernican hypothesis, a belief he...
... As I understand it, Gallileo built a _lot_ of scopes. He was constantly refining what he made. Most he gave away to patrons (in return for patronage <G>). ...
The Venetian senate employed what we would now term "a fixer", Paolo Sarpi, to strike a deal with a merchant who had a Perspicillum for sale. Sarpi (who had...
I am interested in doing a little more imaging using a longer focal length scope, something around f/9 or f/10. I have been looking around and noticed there...
Most refractors in that f/ratio range are achromats. You would pick up CA on your images, but there is at least one program that can remove the purple halo. ...
Dear group: I have upgraded the focuser of my TAK. TOA-150 and therefore have put up for sale the light green base plate that screws directly into the 7" white...
Would you be interested in a pristine classic Meade 102ED APO? f/9 920mm, with rings, MRF finder, dual speed William Optics rotatable 2" Crayford focuser...
I'm looking to buy a new refractor. I am considering the Celestron Omni XLT 120mm. Celestron also offers the XLT 102mm ED but for considerable more money and a...
Dan; Normally speaking it is the level of color correction in a refractor. An achromat has the lowest level of color correction normally speaking and a well...
Also, a true Apo is about more than absolute color correction. It's also designed for no spherical aberration, in fact, no aberrations to speak of. An ED can...
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