http://www.citydeepsky.com/wiki/index.php?title=Telescope&feed=atom&action=historyTelescope - Revision history2024-03-28T19:16:05ZRevision history for this page on the wikiMediaWiki 1.19.17http://www.citydeepsky.com/wiki/index.php?title=Telescope&diff=3046&oldid=prevEvilscientist: /* Reflecting Telescopes */ links to telescope types.2015-05-26T12:35:11Z<p><span dir="auto"><span class="autocomment">Reflecting Telescopes: </span> links to telescope types.</span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>===Reflecting Telescopes===</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>===Reflecting Telescopes===</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Reflecting telescopes avoid the problem of chromatic aberration by avoiding the use of a lens as a primary objective. In it's place, a parabolic mirror is placed at one end of the telescope and the light is then brought to a focus at some point outside of the telescope. There are many types of reflecting telescopes, the type depending on where the light is brought to a focus. Two common types are the [[Newtonian]] and the [[Cassegrain]].</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>Reflecting telescopes avoid the problem of chromatic aberration by avoiding the use of a lens as a primary objective. In it's place, a parabolic mirror is placed at one end of the telescope and the light is then brought to a focus at some point outside of the telescope. There are many types of reflecting telescopes, the type depending on where the light is brought to a focus. Two common types are the [[<ins class="diffchange diffchange-inline">Newtonian telescope|</ins>Newtonian]] and the [[<ins class="diffchange diffchange-inline">Cassegrain Telescope|</ins>Cassegrain]].</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Image:Newtonian.png |thumb|right|400px|Newtonian Reflecting Telescope]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Image:Newtonian.png |thumb|right|400px|Newtonian Reflecting Telescope]]</div></td></tr>
</table>Evilscientisthttp://www.citydeepsky.com/wiki/index.php?title=Telescope&diff=3043&oldid=prevEvilscientist: /* Reflecting Telescopes */2015-05-26T02:16:32Z<p><span dir="auto"><span class="autocomment">Reflecting Telescopes</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>===Reflecting Telescopes===</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>===Reflecting Telescopes===</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Reflecting telescopes avoid the problem of chromatic aberration by avoiding the use of a lens as a primary objective. In it's place, a parabolic mirror is placed at one end of the telescope and the light is then brought to a focus at some point outside of the telescope. There are many types of reflecting telescopes, the type depending on where the light is brought to a focus. Two common types are the [Newtonian] and the [Cassegrain].</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>Reflecting telescopes avoid the problem of chromatic aberration by avoiding the use of a lens as a primary objective. In it's place, a parabolic mirror is placed at one end of the telescope and the light is then brought to a focus at some point outside of the telescope. There are many types of reflecting telescopes, the type depending on where the light is brought to a focus. Two common types are the <ins class="diffchange diffchange-inline">[</ins>[Newtonian<ins class="diffchange diffchange-inline">]</ins>] and the <ins class="diffchange diffchange-inline">[</ins>[Cassegrain<ins class="diffchange diffchange-inline">]</ins>].</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Image:Newtonian.png |thumb|right|400px|Newtonian Reflecting Telescope]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Image:Newtonian.png |thumb|right|400px|Newtonian Reflecting Telescope]]</div></td></tr>
</table>Evilscientisthttp://www.citydeepsky.com/wiki/index.php?title=Telescope&diff=3042&oldid=prevEvilscientist: /* Reflecting Telescopes */ wikilink Newtonian and Cassegrain2015-05-26T02:15:56Z<p><span dir="auto"><span class="autocomment">Reflecting Telescopes: </span> wikilink Newtonian and Cassegrain</span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>===Reflecting Telescopes===</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>===Reflecting Telescopes===</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Reflecting telescopes avoid the problem of chromatic aberration by avoiding the use of a lens as a primary objective. In it's place, a parabolic mirror is placed at one end of the telescope and the light is then brought to a focus at some point outside of the telescope. There are many types of reflecting telescopes, the type depending on where the light is brought to a focus. Two common types are the Newtonian and the Cassegrain.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>Reflecting telescopes avoid the problem of chromatic aberration by avoiding the use of a lens as a primary objective. In it's place, a parabolic mirror is placed at one end of the telescope and the light is then brought to a focus at some point outside of the telescope. There are many types of reflecting telescopes, the type depending on where the light is brought to a focus. Two common types are the <ins class="diffchange diffchange-inline">[</ins>Newtonian<ins class="diffchange diffchange-inline">] </ins>and the <ins class="diffchange diffchange-inline">[</ins>Cassegrain<ins class="diffchange diffchange-inline">]</ins>.</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Image:Newtonian.png |thumb|right|400px|Newtonian Reflecting Telescope]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Image:Newtonian.png |thumb|right|400px|Newtonian Reflecting Telescope]]</div></td></tr>
</table>Evilscientisthttp://www.citydeepsky.com/wiki/index.php?title=Telescope&diff=3034&oldid=prevEvilscientist: remove test category2014-07-09T14:22:26Z<p>remove test category</p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Observing Concepts]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Observing Concepts]]</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;">[[Category:Testing]]</del></div></td><td colspan="2"> </td></tr>
</table>Evilscientisthttp://www.citydeepsky.com/wiki/index.php?title=Telescope&diff=3033&oldid=prevEvilscientist: testing categories2014-07-09T14:21:06Z<p>testing categories</p>
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</table>Evilscientisthttp://www.citydeepsky.com/wiki/index.php?title=Telescope&diff=2895&oldid=prevEvilscientist: /* Catadioptric Telescopes */ correct typo2010-02-23T13:58:13Z<p><span dir="auto"><span class="autocomment">Catadioptric Telescopes: </span> correct typo</span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Catadioptric telescopes combine the best qualities of both refracting and reflecting telescopes and have few of their problems. In terms of price per unit aperture, Catadioptric telescopes tend to fall between refractors and reflectors. This is due to the fact that the corrector plate has to be ground.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Catadioptric telescopes combine the best qualities of both refracting and reflecting telescopes and have few of their problems. In terms of price per unit aperture, Catadioptric telescopes tend to fall between refractors and reflectors. This is due to the fact that the corrector plate has to be ground.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Like reflecting telescopes, catadioptric telescopes also have a secondary mirror and hence a central obstruction. This also causes diffraction, though the corrector plate supports the mirror and there is no diffraction <del class="diffchange diffchange-inline">patter </del>caused by a mirror support.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>Like reflecting telescopes, catadioptric telescopes also have a secondary mirror and hence a central obstruction. This also causes diffraction, though the corrector plate supports the mirror and there is no diffraction <ins class="diffchange diffchange-inline">pattern </ins>caused by a mirror support.</div></td></tr>
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</table>Evilscientisthttp://www.citydeepsky.com/wiki/index.php?title=Telescope&diff=2894&oldid=prevEvilscientist: /* Telescope Basics */ add parameter number2010-02-23T13:52:32Z<p><span dir="auto"><span class="autocomment">Telescope Basics: </span> add parameter number</span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>==Telescope Basics==</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>==Telescope Basics==</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Optical telescopes come in many shapes, sizes and designs. In general there are <del class="diffchange diffchange-inline">x </del>parameters used to describe all telescopes:</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>Optical telescopes come in many shapes, sizes and designs. In general there are <ins class="diffchange diffchange-inline">three </ins>parameters used to describe all telescopes:</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*aperture - the diameter of the primary lens or mirror</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*aperture - the diameter of the primary lens or mirror</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*focal length - the focal length of the optical system, in other words the apparent distance from the primary lens or mirror to the point where an image is in focus.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*focal length - the focal length of the optical system, in other words the apparent distance from the primary lens or mirror to the point where an image is in focus.</div></td></tr>
</table>Evilscientisthttp://www.citydeepsky.com/wiki/index.php?title=Telescope&diff=2807&oldid=prevEvilscientist: /* Catadioptric Telescopes */ add Maksutov link2009-11-21T03:50:40Z<p><span dir="auto"><span class="autocomment">Catadioptric Telescopes: </span> add Maksutov link</span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>===Catadioptric Telescopes===</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>===Catadioptric Telescopes===</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>Catadioptric telescopes are a mix between refracting and reflecting telescopes. A corrector plate is placed in front of the primary mirror to eliminate the problem of coma. Since the mirror still is responsible for focusing the light, there is no chromatic aberration. Because of this catadioptric telescopes are popular among amateur astronomers. There are two basic types of catadioptirc telescope, the Schmidt and the Maksutov.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>Catadioptric telescopes are a mix between refracting and reflecting telescopes. A corrector plate is placed in front of the primary mirror to eliminate the problem of coma. Since the mirror still is responsible for focusing the light, there is no chromatic aberration. Because of this catadioptric telescopes are popular among amateur astronomers. There are two basic types of catadioptirc telescope, the Schmidt and the <ins class="diffchange diffchange-inline">[[</ins>Maksutov<ins class="diffchange diffchange-inline">]]</ins>.</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Image:Schmidt.png |thumb|right|400px|Schmidt Catadioptric Telescope]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Image:Schmidt.png |thumb|right|400px|Schmidt Catadioptric Telescope]]</div></td></tr>
</table>Evilscientisthttp://www.citydeepsky.com/wiki/index.php?title=Telescope&diff=2792&oldid=prevEvilscientist: add to telescope category2009-11-19T01:27:25Z<p>add to telescope category</p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Astronomical concept]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Astronomical concept]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Observing Concepts]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Observing Concepts]]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[Category:Telescopes]]</ins></div></td></tr>
</table>Evilscientisthttp://www.citydeepsky.com/wiki/index.php?title=Telescope&diff=2790&oldid=prevEvilscientist: add categories2009-11-19T01:24:02Z<p>add categories</p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div><references/></div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div><references/></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[Category:Astronomical concept]]</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[Category:Observing Concepts]]</ins></div></td></tr>
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