http://clearnights.forummotion.com/feed/? Latest topics Thu, 09 Jul 2009 14:03:30 GMT 10 http://illiweb.com/fa/empty.gif http://clearnights.forummotion.com/feed/? http://clearnights.forummotion.com/off-topic-f11/pacific-ocean-park-amusement-pier-t33.htm l.knowlen http://pacificoceanpark.tripod.com]]> OFF TOPIC Mon, 09 Mar 2009 20:35:57 GMT http://clearnights.forummotion.com/off-topic-f11/pacific-ocean-park-amusement-pier-t33.htm#69 http://clearnights.forummotion.com/off-topic-f11/pacific-ocean-park-amusement-pier-t33.htm http://clearnights.forummotion.com/off-topic-f11/star-trek-tricorder-t87.htm Admin http://www.trekker-reactor.isq-networks-server.com/lcars/]]> OFF TOPIC Thu, 14 May 2009 02:08:38 GMT http://clearnights.forummotion.com/off-topic-f11/star-trek-tricorder-t87.htm#230 http://clearnights.forummotion.com/off-topic-f11/star-trek-tricorder-t87.htm http://clearnights.forummotion.com/off-topic-f11/the-cyclone-racer-roller-coaster-t34.htm l.knowlen www.cycloneracer.com]]> OFF TOPIC Mon, 09 Mar 2009 20:39:03 GMT http://clearnights.forummotion.com/off-topic-f11/the-cyclone-racer-roller-coaster-t34.htm#70 http://clearnights.forummotion.com/off-topic-f11/the-cyclone-racer-roller-coaster-t34.htm http://clearnights.forummotion.com/off-topic-f11/michael-jackson-shopped-at-gelsons-market-t111.htm ffcsb http://www.wrightwoodcalif.com/forum/index.php?action=printpage;topic=14076.0]]> OFF TOPIC Thu, 09 Jul 2009 14:03:30 GMT http://clearnights.forummotion.com/off-topic-f11/michael-jackson-shopped-at-gelsons-market-t111.htm#317 http://clearnights.forummotion.com/off-topic-f11/michael-jackson-shopped-at-gelsons-market-t111.htm http://clearnights.forummotion.com/off-topic-f11/michael-jackson-t110.htm ffcsb http://www.youtube.com/watch?v=W-gH2gAXjAw
]]> OFF TOPIC Mon, 06 Jul 2009 04:09:17 GMT http://clearnights.forummotion.com/off-topic-f11/michael-jackson-t110.htm#316 http://clearnights.forummotion.com/off-topic-f11/michael-jackson-t110.htm http://clearnights.forummotion.com/product-reviews-f9/10-reflector-issue-t109.htm Mark Smith Hi everyone, you might have seen my post in "introductions." I just got the Orion SkyQuest XT10. I'm sure I'll have fun playing with the dobsonian mount it came with for quite a long time, but down the road I'm sure I'd like to try my hand at some astrophotography. What is the feasability of putting the OTA on an EQ mount? Where would be the best place to buy one? I've done a bit of googling and haven't found much, and what I did find was prohibitively expensive. I'm talking upwards ... PRODUCT REVIEWS Thu, 02 Jul 2009 03:14:58 GMT http://clearnights.forummotion.com/product-reviews-f9/10-reflector-issue-t109.htm#314 http://clearnights.forummotion.com/product-reviews-f9/10-reflector-issue-t109.htm http://clearnights.forummotion.com/general-observing-f8/my-observing-t108.htm billygibbons Heh, too big of a soapbox, eh? I guess what I mean is that with every different power we use there is a different world to see. Heck, I was amazed at the different fields I saw last night at 75x. Seems each power brings out somethind different that only it can show. The thing with super low powers, for me right now, is that I have never had a scope that would do it. I'm sure 15x-25x binoculars would show me the same thing, but of course they would need to be mounted--and I don't have any. But ... GENERAL OBSERVING Thu, 02 Jul 2009 02:55:03 GMT http://clearnights.forummotion.com/general-observing-f8/my-observing-t108.htm#312 http://clearnights.forummotion.com/general-observing-f8/my-observing-t108.htm http://clearnights.forummotion.com/product-reviews-f9/any-good-barlow-2x-t107.htm johnm Can anyone advise on a good 2x Barlow? I apoligize if this question has been repeated (which I am sure for you veterans it has been), but prices vary from one extreme to the next, and from what I have been reading there seems to be a difference in quality. Money is somewhat an object in the household, but I would like to buy a fair quality piece. If you rather feel free to PM me with a response! I appreciate anyone's time for responding. Thanks. PRODUCT REVIEWS Thu, 02 Jul 2009 02:51:10 GMT http://clearnights.forummotion.com/product-reviews-f9/any-good-barlow-2x-t107.htm#310 http://clearnights.forummotion.com/product-reviews-f9/any-good-barlow-2x-t107.htm http://clearnights.forummotion.com/are-you-a-beginner-f7/atm-f-6-t106.htm lyle Today I have finally finished my 8" f/6.26 mirror. It has taken about a year. It came back from the coaters this last Tuesday and looks good. It has been a long journey with lots of learning along the way. Thank you everyone for your help while I worked on this mirror. You have helped me to: * Know to go back to grinding instead of trying to polish out the original scratches that came with the mirror. * Figure out that my bevel was the cause of new scratches and what to do about it. ... ARE YOU A BEGINNER Thu, 02 Jul 2009 01:40:31 GMT http://clearnights.forummotion.com/are-you-a-beginner-f7/atm-f-6-t106.htm#309 http://clearnights.forummotion.com/are-you-a-beginner-f7/atm-f-6-t106.htm http://clearnights.forummotion.com/off-topic-f11/amateur-astronomy-s-assholes-t102.htm astro2 Philo Jewett, Tarzana, CA. Mark Tracy owner of now defunct LA Optical & California Telescope Company John Pons, North Hollywood, CA. Ed Zucardi, Los Angeles, CA. CN- Super Member, Malcom_L CN- Super Member, SteveL Mark Rieck owner of Teton Telescopes John Johnson of Astronomy.com Johnm of Astronomy.com & Telescope Junkies Tim Kerr of Astronomy.com & Our Dark Skies Calos, UK of Astro-Chat & Topix Evan Chan of Astromart Herb York owner of Anacortes & ... OFF TOPIC Tue, 02 Jun 2009 04:32:41 GMT http://clearnights.forummotion.com/off-topic-f11/amateur-astronomy-s-assholes-t102.htm#268 http://clearnights.forummotion.com/off-topic-f11/amateur-astronomy-s-assholes-t102.htm http://clearnights.forummotion.com/off-topic-f11/attention-nbc-universal-t105.htm billygibbons ]]> OFF TOPIC Sat, 27 Jun 2009 05:08:04 GMT http://clearnights.forummotion.com/off-topic-f11/attention-nbc-universal-t105.htm#302 http://clearnights.forummotion.com/off-topic-f11/attention-nbc-universal-t105.htm http://clearnights.forummotion.com/say-hello-f6/newbie-here-t91.htm tkerr ]]> SAY HELLO Sun, 24 May 2009 02:59:22 GMT http://clearnights.forummotion.com/say-hello-f6/newbie-here-t91.htm#236 http://clearnights.forummotion.com/say-hello-f6/newbie-here-t91.htm http://clearnights.forummotion.com/off-topic-f11/who-owns-this-forum-t103.htm lyle ]]> OFF TOPIC Wed, 03 Jun 2009 23:27:37 GMT http://clearnights.forummotion.com/off-topic-f11/who-owns-this-forum-t103.htm#279 http://clearnights.forummotion.com/off-topic-f11/who-owns-this-forum-t103.htm http://clearnights.forummotion.com/astronomy-news-events-f4/astronomy-talk-t98.htm johnjohnson Sincerely,
John Johnson]]> ASTRONOMY NEWS & EVENTS Sat, 30 May 2009 21:29:35 GMT http://clearnights.forummotion.com/astronomy-news-events-f4/astronomy-talk-t98.htm#254 http://clearnights.forummotion.com/astronomy-news-events-f4/astronomy-talk-t98.htm http://clearnights.forummotion.com/say-hello-f6/hello-to-all-trolls-t100.htm johnm ]]> SAY HELLO Tue, 02 Jun 2009 03:16:30 GMT http://clearnights.forummotion.com/say-hello-f6/hello-to-all-trolls-t100.htm#260 http://clearnights.forummotion.com/say-hello-f6/hello-to-all-trolls-t100.htm http://clearnights.forummotion.com/are-you-a-beginner-f7/the-telescope-s-f-number-t5.htm Admin The f/number (focal ratio) of any telescope tells two things about the telescope and that is it's intended purpose and it's photographic performance. The brightness of a star depends on the telescope's aperture not the telescope's f/number. All telescopes of the same aperture at any magnification will show the same visual brightness. There are many that insist their long focal ratio telescope gets higher contrast, this is not correct. A refracting telescope does have more contrast than any other ... ARE YOU A BEGINNER Thu, 19 Feb 2009 03:38:51 GMT http://clearnights.forummotion.com/are-you-a-beginner-f7/the-telescope-s-f-number-t5.htm#5 http://clearnights.forummotion.com/are-you-a-beginner-f7/the-telescope-s-f-number-t5.htm http://clearnights.forummotion.com/say-hello-f6/hi-hi-hi-hi-hi-t93.htm Carlos UK ]]> SAY HELLO Sun, 24 May 2009 04:22:33 GMT http://clearnights.forummotion.com/say-hello-f6/hi-hi-hi-hi-hi-t93.htm#241 http://clearnights.forummotion.com/say-hello-f6/hi-hi-hi-hi-hi-t93.htm http://clearnights.forummotion.com/off-topic-f11/look-what-was-posted-at-astronomycom-t97.htm ffcsb Now look who is spamming, johnjohnson Joined on 07-07-2003 Sioux Falls S.D. Posts 1,107 Loren Knowlen has returned http://cs.astronomy.com/asycs/forums/t/38792.aspx JJ Signature Sioux Empire Astronomy Club Gallery Hodgson Observatory My Flicker Astro Site Report abuse Quick Reply Favorites Contact Reply 03-08-2009 08:10 PM In reply to johnjohnson Joined on 07-07-2003 Sioux Falls S.D. Posts 1,107 Re: Loren Knowlen has returened and ... OFF TOPIC Wed, 27 May 2009 04:52:59 GMT http://clearnights.forummotion.com/off-topic-f11/look-what-was-posted-at-astronomycom-t97.htm#253 http://clearnights.forummotion.com/off-topic-f11/look-what-was-posted-at-astronomycom-t97.htm http://clearnights.forummotion.com/astronomy-news-events-f4/nasa-lands-t95.htm tkerr ]]> ASTRONOMY NEWS & EVENTS Mon, 25 May 2009 03:31:35 GMT http://clearnights.forummotion.com/astronomy-news-events-f4/nasa-lands-t95.htm#248 http://clearnights.forummotion.com/astronomy-news-events-f4/nasa-lands-t95.htm http://clearnights.forummotion.com/general-observing-f8/the-baader-24mm-hyperion-t94.htm johnjohnson The Baader Planetarium Hyperion 68 degree Modular Eyepieces offer world-class performance and unique photo-visual features, at an unheard of price. No longer do amateurs need to spend more on their eyepieces than their primary instrument, in order to get true high-end performance in a wide-field eyepiece. Not just a different branded version of their highly regarded cousins, the Hyperions have been totally redesigned to deliver better transmission, contrast, and useful new features. Baader Planetarium ... GENERAL OBSERVING Mon, 25 May 2009 03:08:36 GMT http://clearnights.forummotion.com/general-observing-f8/the-baader-24mm-hyperion-t94.htm#242 http://clearnights.forummotion.com/general-observing-f8/the-baader-24mm-hyperion-t94.htm http://clearnights.forummotion.com/astronomy-news-events-f4/star-gazer-s-lounge-being-abused-by-some-of-it-s-moderators-t96.htm wcaa The Stargazer's Lounge forum is being used a promotional tool for Tom Baader and his Baader Planetarium products. The case is simple, a group of moderators along with members in their attempt to receive discounts on Baader Planetarium products have hijacked the forum where they will deliberately spam, harass, and bother other members should they have another point of view which results in that member being bullied or banned off the forum. Further their harassment does not stop ... ASTRONOMY NEWS & EVENTS Mon, 25 May 2009 03:33:53 GMT http://clearnights.forummotion.com/astronomy-news-events-f4/star-gazer-s-lounge-being-abused-by-some-of-it-s-moderators-t96.htm#249 http://clearnights.forummotion.com/astronomy-news-events-f4/star-gazer-s-lounge-being-abused-by-some-of-it-s-moderators-t96.htm http://clearnights.forummotion.com/product-reviews-f9/vernonscope-s-brandons-t92.htm johnjohnson I have used Zeiss, Clave, TeleVue, RKEs but the eyepieces I love the best are the oculars known as the Brandons for my lunar and planetary observing. Brandon is a brand name of VernonScope, and is applied to a variety of products, including a well-established line of eyepieces. Several of the short- to medium focal-length Brandon eyepieces are advertised as orthoscopics, yet they appear upon disassembly to resemble Plossls. They use four lenses in an unsymmetrical duplet formulation ... PRODUCT REVIEWS Sun, 24 May 2009 03:38:49 GMT http://clearnights.forummotion.com/product-reviews-f9/vernonscope-s-brandons-t92.htm#239 http://clearnights.forummotion.com/product-reviews-f9/vernonscope-s-brandons-t92.htm http://clearnights.forummotion.com/product-reviews-f9/burbank-optical-company-t58.htm Astro1 Several years ago I purchased a 6”F/8 refractor from Burbank Optical Company to replace my vintage Saunders 102mm refractor. Both telescopes performed well for deep-sky up at the Mt. Pinos astronomers star pary. However in the city for looking at detail for both the planets and the moon both telescopes did poorly because of the seeing conditions at my home observing site. I did notice that the B.O.C. refractor had very little color correction which was helpful in observing Jupiter, Mars, and ... PRODUCT REVIEWS Wed, 25 Mar 2009 21:04:52 GMT http://clearnights.forummotion.com/product-reviews-f9/burbank-optical-company-t58.htm#129 http://clearnights.forummotion.com/product-reviews-f9/burbank-optical-company-t58.htm http://clearnights.forummotion.com/product-reviews-f9/eyepieces-anyone-t8.htm Admin Well yes we have used them all. At first we would refer you to both Zeiss & Clave but they are very rare. For planetary,lunar, and solar observing we enjoy the Brandons which we use on our 6" refractor at the observatory. However what we like the most is the Lumicon 2" diag., Filters from William optics but the best eyepieces to use on a large aperture Celestron/Mead SCT. are the 2" Meade 40mm SWA, Televue 2" 20mm Nagler, and either the Meade 8.8 SWA or the Televue 2" ... PRODUCT REVIEWS Thu, 19 Feb 2009 03:45:32 GMT http://clearnights.forummotion.com/product-reviews-f9/eyepieces-anyone-t8.htm#8 http://clearnights.forummotion.com/product-reviews-f9/eyepieces-anyone-t8.htm http://clearnights.forummotion.com/product-reviews-f9/why-i-love-my-boc-refractor-t90.htm tkerr Why a B.O.C. 6-inch F/8 Refractor? From my years of experience as an astronomer who has used a variety of telescopes of different types along with using very rare large apertures of 8-12 inches. I have found the 6 inch F/8 refracting telescope is the optimum design for lunar, planetary, and solar observing. The telescope's size makes it the best instrument in my opinion for advanced observers to use and simple enough for elementary observers to use for their viewing. An observer can ... PRODUCT REVIEWS Sun, 24 May 2009 02:58:41 GMT http://clearnights.forummotion.com/product-reviews-f9/why-i-love-my-boc-refractor-t90.htm#235 http://clearnights.forummotion.com/product-reviews-f9/why-i-love-my-boc-refractor-t90.htm http://clearnights.forummotion.com/astronomy-news-events-f4/jullian-starfest-ii-t89.htm Astro1 August 20th - 23rd, 2009 Menghini Winery, Julian, CA]]> ASTRONOMY NEWS & EVENTS Sat, 23 May 2009 13:58:24 GMT http://clearnights.forummotion.com/astronomy-news-events-f4/jullian-starfest-ii-t89.htm#234 http://clearnights.forummotion.com/astronomy-news-events-f4/jullian-starfest-ii-t89.htm http://clearnights.forummotion.com/say-hello-f6/howdy-everybody-t86.htm billygibbons ]]> SAY HELLO Tue, 12 May 2009 04:22:33 GMT http://clearnights.forummotion.com/say-hello-f6/howdy-everybody-t86.htm#229 http://clearnights.forummotion.com/say-hello-f6/howdy-everybody-t86.htm http://clearnights.forummotion.com/say-hello-f6/i-made-it-folks-t85.htm wcaa ]]> SAY HELLO Mon, 11 May 2009 03:29:04 GMT http://clearnights.forummotion.com/say-hello-f6/i-made-it-folks-t85.htm#224 http://clearnights.forummotion.com/say-hello-f6/i-made-it-folks-t85.htm http://clearnights.forummotion.com/say-hello-f6/hello-clear-nights-members-t84.htm lyle I'm glad to join the forum SAY HELLO Mon, 11 May 2009 03:23:02 GMT http://clearnights.forummotion.com/say-hello-f6/hello-clear-nights-members-t84.htm#222 http://clearnights.forummotion.com/say-hello-f6/hello-clear-nights-members-t84.htm http://clearnights.forummotion.com/are-you-a-beginner-f7/stargazer-s-cocktail-lounge-t83.htm N. Wells http://tech.groups.yahoo.com/group/stargazerscocktaillounge/]]> ARE YOU A BEGINNER Sat, 09 May 2009 03:44:45 GMT http://clearnights.forummotion.com/are-you-a-beginner-f7/stargazer-s-cocktail-lounge-t83.htm#221 http://clearnights.forummotion.com/are-you-a-beginner-f7/stargazer-s-cocktail-lounge-t83.htm http://clearnights.forummotion.com/are-you-a-beginner-f7/twittering-t81.htm rabob ]]> ARE YOU A BEGINNER Mon, 04 May 2009 03:18:09 GMT http://clearnights.forummotion.com/are-you-a-beginner-f7/twittering-t81.htm#209 http://clearnights.forummotion.com/are-you-a-beginner-f7/twittering-t81.htm http://clearnights.forummotion.com/say-hello-f6/welcome-to-all-t80.htm Admin ]]> SAY HELLO Sun, 03 May 2009 19:53:59 GMT http://clearnights.forummotion.com/say-hello-f6/welcome-to-all-t80.htm#201 http://clearnights.forummotion.com/say-hello-f6/welcome-to-all-t80.htm http://clearnights.forummotion.com/astronomy-news-events-f4/cal-sky-2009-t79.htm Mark Smith ]]> ASTRONOMY NEWS & EVENTS Sun, 03 May 2009 19:52:41 GMT http://clearnights.forummotion.com/astronomy-news-events-f4/cal-sky-2009-t79.htm#200 http://clearnights.forummotion.com/astronomy-news-events-f4/cal-sky-2009-t79.htm http://clearnights.forummotion.com/are-you-a-beginner-f7/in-the-city-astronomy-t17.htm rabob What Can An Astronomer Expect to See in a Light Polluted City with a Telescope? From a very light polluted city one can see the moon and planets perfectly in a telescope (basically almost identically to seeing them in the less light polluted skies). Bright star clusters are all pretty good, we just lose out on DSO (nebulae dimmer star clusters and double stars, etc). If you do want to see DSOs, make sure you go out when the moon is not out. However if you are in the city, you can offset ... ARE YOU A BEGINNER Tue, 24 Feb 2009 23:22:11 GMT http://clearnights.forummotion.com/are-you-a-beginner-f7/in-the-city-astronomy-t17.htm#17 http://clearnights.forummotion.com/are-you-a-beginner-f7/in-the-city-astronomy-t17.htm http://clearnights.forummotion.com/are-you-a-beginner-f7/the-refracting-telescope-t1.htm Admin Refractors are what the average person identifies with the word "telescope", a long, thin tube where light passes in a straight line from the front objective lens directly to the eyepiece at the opposite end of the tube. Advantages: Easy to use and reliable due to the simplicity of design. Little or no maintenance. Excellent for lunar, planetary and binary star observing especially in larger apertures. Good for distant terrestrial viewing. High contrast images with no secondary mirror ... ARE YOU A BEGINNER Thu, 19 Feb 2009 03:18:37 GMT http://clearnights.forummotion.com/are-you-a-beginner-f7/the-refracting-telescope-t1.htm#1 http://clearnights.forummotion.com/are-you-a-beginner-f7/the-refracting-telescope-t1.htm http://clearnights.forummotion.com/are-you-a-beginner-f7/here-is-the-information-along-with-rules-t76.htm astro2 What I have found ; The Good: 1) Don’t buy anything before you discuss it on cloudy nights. Someone probably brought it and used it already. 2) Hyperion’s are excellent eyepieces. 3) Even if you have a go to scope you still need to learn the sky. 4) Charles Messier was the man 5) The best scope is the one you use. 6) Read every post with an open mind, remember your millage will vary 7) 2 inch eyepieces rock Most astro gear products are made in Asia, no matter ... ARE YOU A BEGINNER Thu, 09 Apr 2009 03:46:47 GMT http://clearnights.forummotion.com/are-you-a-beginner-f7/here-is-the-information-along-with-rules-t76.htm#187 http://clearnights.forummotion.com/are-you-a-beginner-f7/here-is-the-information-along-with-rules-t76.htm http://clearnights.forummotion.com/product-reviews-f9/telescopes-i-favor-t75.htm Admin 6"F/15 REFRACTOR
6"f/8 REFRACTOR
10"-12" F/8 - F/12 REFLECTOR
9"F/12 TAKAHASHI SCT
TELEVUE, ASTRO-PHY, TMB, BAADER, and D&G REFRACTORS
More to come..... ]]> PRODUCT REVIEWS Wed, 08 Apr 2009 19:48:58 GMT http://clearnights.forummotion.com/product-reviews-f9/telescopes-i-favor-t75.htm#184 http://clearnights.forummotion.com/product-reviews-f9/telescopes-i-favor-t75.htm http://clearnights.forummotion.com/product-reviews-f9/the-questar-7-t51.htm N. Wells The Questar 7 is a superfine instrument and will show you more on all objects that fit it's field of view then a 4" apo, or a 5" apo for that matter. That is why it has replaced my 5" Astro-Physics EDFS. Please keep in mind that I am a visual astronomer, all photons to the retina! The Questar 7 is best used for medium to high power observations, ranging from 80x - 400x, altough I feel it's general nights sweetspot is between 120x and 230x. That means it needs a widefield companion. ... PRODUCT REVIEWS Tue, 17 Mar 2009 16:30:29 GMT http://clearnights.forummotion.com/product-reviews-f9/the-questar-7-t51.htm#119 http://clearnights.forummotion.com/product-reviews-f9/the-questar-7-t51.htm http://clearnights.forummotion.com/general-observing-f8/eyepiece-you-say-t42.htm Greg Smith An eyepiece is simply a precision magnifier. (Another name for an eyepiece is ocular.) The eyepiece used with a telescope magnifies the image that is formed by the main optical system. There are many different kinds of eyepiece designs for various applications. The design and quality of the eyepiece can drastically affect the overall performance of the telescope system. An eyepiece is usually described by barrel diameter and focal length. Common barrel diameters are 0.96", 1.25" ... GENERAL OBSERVING Tue, 10 Mar 2009 00:23:13 GMT http://clearnights.forummotion.com/general-observing-f8/eyepiece-you-say-t42.htm#100 http://clearnights.forummotion.com/general-observing-f8/eyepiece-you-say-t42.htm http://clearnights.forummotion.com/product-reviews-f9/picking-a-refractor-t74.htm Mark Smith As to the great refractor of 6"F/15, One will get dozens of different opinions on what is best, but I will tell you that for any given type of scope configuration, be it Newtonian, Cassegrain or Refractor, there will be excellent, just acceptable and rather poor examples for each type. No one type can lay claim to being the absolute best. If you are looking for an outstanding planetary scope you should consider the following: In a Newtonian 8" to 12" with small central obstruction ... PRODUCT REVIEWS Tue, 07 Apr 2009 20:05:37 GMT http://clearnights.forummotion.com/product-reviews-f9/picking-a-refractor-t74.htm#181 http://clearnights.forummotion.com/product-reviews-f9/picking-a-refractor-t74.htm http://clearnights.forummotion.com/off-topic-f11/watch-the-plane-try-to-land-in-heavy-winds-t48.htm Greg Smith http://www.youtube.com/watch?v=ow96LeEQSBI]]> OFF TOPIC Wed, 11 Mar 2009 01:51:15 GMT http://clearnights.forummotion.com/off-topic-f11/watch-the-plane-try-to-land-in-heavy-winds-t48.htm#110 http://clearnights.forummotion.com/off-topic-f11/watch-the-plane-try-to-land-in-heavy-winds-t48.htm http://clearnights.forummotion.com/product-reviews-f9/the-c-11-sct-t61.htm astro2 With the largest aperture of the Celestron CPC GPS line the CPC 1100 GPS Schmidt-Cassegrain telescope delivers the most light gathering power and a limiting magnitude of nearly 15. The CPC 1100 GPS takes full advantage of its vast database of thousands of NGC and Abell galaxies and provides a new level of detail to all your favorite deep sky objects.?Celestron CPC Telescopes are available in three aperture size choices:8 Inch CPC Schmidt-Cassegrain Telescope9.25 Inch CPC Schmidt-Cassegrain Telescope11 ... PRODUCT REVIEWS Mon, 30 Mar 2009 03:07:29 GMT http://clearnights.forummotion.com/product-reviews-f9/the-c-11-sct-t61.htm#134 http://clearnights.forummotion.com/product-reviews-f9/the-c-11-sct-t61.htm http://clearnights.forummotion.com/product-reviews-f9/meade-telescopes-t60.htm astro2 · Meade Model 1220 Field De-rotater for Meade LX200GPS Telescopes · Meade LX200GPS telescopes may be operated in the altazimuth mode (i.e., without polar alignment) for all visual applications and for photographic or CCD imaging exposures of up to about five minutes duration. · Most LX200GPS owners use their telescope in the altazimuth mode the great majority ofthe time. During longer photo or CCD exposures in the altazimuth mode, however, an effect called field rotation becomes evident. · Simply ... PRODUCT REVIEWS Mon, 30 Mar 2009 03:05:37 GMT http://clearnights.forummotion.com/product-reviews-f9/meade-telescopes-t60.htm#133 http://clearnights.forummotion.com/product-reviews-f9/meade-telescopes-t60.htm http://clearnights.forummotion.com/product-reviews-f9/celestron-c-8-t62.htm astro2 The CPC 800 GPS XLT is the most portable of Celestron's top-of-the-line fork-mounted astronomical telescopes and includes Celestron's premium StarBright XLT coatings. This telescope is at home as a superb visual instrument or with optional wedge and CCD cameras as a serious astrophotographer's tool. Turn this scope to planets and see amazing detail on the surface of Jupiter; see Cassini's Division in the rings of Saturn and resolve details on the surface of Mars. Even the distant Uranus Neptune ... PRODUCT REVIEWS Mon, 30 Mar 2009 03:09:04 GMT http://clearnights.forummotion.com/product-reviews-f9/celestron-c-8-t62.htm#135 http://clearnights.forummotion.com/product-reviews-f9/celestron-c-8-t62.htm http://clearnights.forummotion.com/product-reviews-f9/televue-barlow-t63.htm Mark Smith Tele Vue 2x BIG Barlow 2 Inch with 1-1/4 AdapterOffered in a 2x magnification the Big Barlow is ideal for Newtonian scope owners. It will be parfocal with both 2" and 1?" eyepieces in this application. Features include threads for 48mm filters captive lock screw and full multi-coatings.Properly designed Barlows do wonderful things: They amplify power slow the telescope's f/# (improving eyepiece sharpness) and give designers the opportunity to compensate for eyepiece aberrations. Tele ... PRODUCT REVIEWS Mon, 30 Mar 2009 03:11:19 GMT http://clearnights.forummotion.com/product-reviews-f9/televue-barlow-t63.htm#136 http://clearnights.forummotion.com/product-reviews-f9/televue-barlow-t63.htm http://clearnights.forummotion.com/product-reviews-f9/orion-barlow-t64.htm Mark Smith Besides doubling the power of any eyepiece, these premium-quality barlows feature 3-element, fully multi-coated lens designs that render exquisite images without introducing additional chromatic aberration. Images appear sharper and more color-correct than with standard, achromatic barlows. They're especially good for high-power lunar and planetary observing and for boosting magnification in short-focal-length telescopes. Barrels are not threaded for filters. PRODUCT REVIEWS Mon, 30 Mar 2009 03:12:03 GMT http://clearnights.forummotion.com/product-reviews-f9/orion-barlow-t64.htm#137 http://clearnights.forummotion.com/product-reviews-f9/orion-barlow-t64.htm http://clearnights.forummotion.com/general-observing-f8/oh-oh-the-seeing-t43.htm Greg Smith "Seeing" is the term astronomers use to describe the sky's atmospheric steadiness. Transparency is used to describe atmospheric clarity. The atmosphere is in continual motion with changing temperatures, air currents or wind and weather fronts, causing stars to twinkle. (The images of twinkling stars are highly distorted and the amount of light reaching us through the air is also affected, so it changes from instant to instant and the star twinkles.) If the stars are twinkling considerably, ... GENERAL OBSERVING Tue, 10 Mar 2009 00:28:46 GMT http://clearnights.forummotion.com/general-observing-f8/oh-oh-the-seeing-t43.htm#101 http://clearnights.forummotion.com/general-observing-f8/oh-oh-the-seeing-t43.htm http://clearnights.forummotion.com/general-observing-f8/1x2x3x4-t44.htm Greg Smith The magnification of a telescope changes as the eyepiece is changed. Magnification can be calculated by dividing the focal length of your telescope by the focal length of the eyepiece. Always start with your lowest magnification (longest focal length) eyepiece and work upwards from there. A 2x Barlow lens will double the magnification of whatever eyepiece you use with it while preserving its eye relief. For example: using a telescope with a 900mm focal length with a 20mm eyepiece ... GENERAL OBSERVING Tue, 10 Mar 2009 00:30:23 GMT http://clearnights.forummotion.com/general-observing-f8/1x2x3x4-t44.htm#102 http://clearnights.forummotion.com/general-observing-f8/1x2x3x4-t44.htm http://clearnights.forummotion.com/general-observing-f8/near-focus-t46.htm Astro1 The near focus is simply the closest distance you can focus a telescope. It’s good to know when using the scope for terrestrial visual or photographic purposes. GENERAL OBSERVING Tue, 10 Mar 2009 00:38:19 GMT http://clearnights.forummotion.com/general-observing-f8/near-focus-t46.htm#104 http://clearnights.forummotion.com/general-observing-f8/near-focus-t46.htm http://clearnights.forummotion.com/general-observing-f8/field-of-view-t47.htm Astro1 The angular size of the sky you can view through a telescope is called the real (true) field of view and is measured in degrees of arc. The larger the field of view, the larger the area of the sky you can see. Field of view is calculated by dividing the apparent field of view (in degrees) of the eyepiece by the magnification. For example, if you are using an eyepiece with a 50 degree apparent field, and the power of the telescope with this eyepiece is 100x, then the field of view would be 0.5 ... GENERAL OBSERVING Tue, 10 Mar 2009 00:39:09 GMT http://clearnights.forummotion.com/general-observing-f8/field-of-view-t47.htm#105 http://clearnights.forummotion.com/general-observing-f8/field-of-view-t47.htm