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Topic: Reflector telescope

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	Tasco Galaxsee 375 Reflector Astronomical Telescope The BestStuff Choice
		Made by Tasco this is an exceptional reflector telescope.
		With a powerful telescope like this that is not too easy, the field of view, magnified as it is, is really quite small.
		If you want to use the telescope for looking at things during the day too you really need a different telescope, this telescope would not be suitable for this, a Refractor telescope would be better for this.
	www.beststuff.co.uk /galaxsee_375_reflector_telescope.htm (621 words)

	Telescopes
		The telescope is the vertical piece in the middle with the mirror close to the floor.
		Many reflector telescope use another light path design called the cassegrain design to reflect the light back through a hole in the primary mirror, so that detectors or the eyepiece can be conveniently placed behind the telescope.
		The images in reflector telescopes do not have holes or shadows in them because the light rays from the unblocked parts of the primary mirror are all added together when they are focussed together.
	www.astronomynotes.com /telescop/s3.htm (989 words)

	Zhumell 10 Inch Dobsonian Reflector Telescope - IN STOCK! $499.00 - Telescopes - Telescopes.com
		Telescopes » Zhumell » Telescopes » 10 Inch Dobsonian Reflector Telescope
		To me, this telescope is so much more user friendly than either one of the other telescopes.
		The telescope is about 60 lbs., which sounds like a lot, but it's really pretty easy to move around.
	www.telescopes.com /products/zhumell-10-inch-dobsonian-reflector-telescope-38399.html (0 words)

	How to Use a Dobsonian Reflector Telescope \| eHow.com
		It moves the telescope on an XY axis, which is to say, up and down and left to right.
		Use the telescope when light pollution is at a minimum, because this kind of telescope is a "light bucket."
		This telescope is inexpensive, because it uses mirrors instead of lenses (see the eHow on refracting telescopes) to gather light.
	www.ehow.com /how_10332_dobsonian-reflector-telescope.html (328 words)

	Amazon.com: Celestron Firstscope 76EQ 76mm Reflector Telescope: Camera & Photo (Site not responding. Last check: )
		Reflectors (also known as Newtonian reflectors or catoptrics) capture light with a mirror at the bottom of a tube, which sends the image to the eyepiece at the top of the tube.
		First-time telescope users sometimes have difficulty with the idea of looking through the side of a telescope, but the big draw for reflectors is that they are by far the cheapest to manufacture--and thus offer the best value--of all telescope types.
		A telescope on an equatorial mount can be aimed at a celestial object and guided with the slow motion controls to follow the object across the sky and keep it in the field of view of your telescope.
	www.amazon.com /exec/obidos/ASIN/B000051TM2/httpwwwyoursa-20?dev-t=D3R39P4FOXC4MW%26camp=2025%26link_code=xm2 (1064 words)

	Amazon.com: Tasco Luminova 420x76mm Reflector Telescope: Camera & Photo (Site not responding. Last check: )
		Refractor Telescope: A refractor telescope collects light though a large objective lens and directs it through the telescope to the eyepiece for magnification.
		Reflector Telescope: Reflectors use a large concave mirror to collect and focus light back to a diagonal mirror which redirects the light to the eyepiece for magnification.
		Reflectors deliver the most magnification in a compact design because they achieve a longer focal length through the use of mirrors.
	www.amazon.com /Tasco-Luminova-420x76mm-Reflector-Telescope/dp/B0000A0AJ8 (581 words)

	UK Telescopes
		Our aim is to provide you with the right telescope at the right price, whilst offering a good range of accessories and combination packages at competitive rates.
		We believe our telescopes represent high levels of manufacturing specification from well established sources and all incorporate features we believe will, used with ‘best practice’, genuinely enhance your viewing experience; this means, for example, no promises of startlingly high magnification that in reality cannot easily sustain a reasonable image.
		In addition to the astronomical telescope we offer a comprehensive selection of accessories: mounts, eyepieces and filters, binoculars, cameras, star charts, red light torches and many other items too numerous to mention here.
	www.uk-telescopes.co.uk (0 words)

	Compare Prices and Read Reviews on Meade DS-2130ATS Model 5.0" F/7.7 GOTO Reflector Telescope - 20132 w/ FREE UPS at ...
		This was the least expensive reflector in the 5" range that also included a GOTO feature.
		The telescope is easily assembled with minimal mechanical aptitude required.
		The telescope aligns itself if you can level it and point it in the general direction of the north star.
	www.epinions.com /content_186959498884?linkin_id=3057321 (371 words)

	Silver AstroVenture 6" Short Tube Reflector Telescope
		With a large 150mm (6 inch) primary mirror, this reflector telescope is ideal for backyard planet hunting.
		Thanks to precision worm gears and a substantial counter weight, the telescope can be balanced so that the slightest finger touch turn of the flexi cables will move the telescope in any direction with a smooth, steady motion.
		Reflector type optical construction (images are seen upside-down, you'll need an optional Erecting Eyepiece to use this scope during the day-time).
	www.protelescope.com /storefrontprofiles/DeluxeSFItemDetail.aspx?sfid=95134&c=642547&i=70951556 (448 words)

	Buying a Telescope
		The reflector telescope, or Newtonian telescope, uses a rear-mounted concave mirror to gather and focus light.
		To determine the magnification of an eyepiece, divide the focal length of the telescope by the focal length of the eyepiece.
		The finder scope is the small scope on the side of a telescope and is used to aim the telescope.
	www.aw-wrdsmth.com /scuttlebutt/Buying-a-Telescope.html (1193 words)

	National Park Service: Astronomy and Astrophysics (Palomar Observatory 200-inch Reflector)
		The foundation of the dome is anchored to the mountain while the foundation for the telescope is separately built on a base of crushed granite to protect the telescope from jar and vibration in the event of an earthquake.
		In 1963, using the 200-inch Hale reflector, Schmidt realized that the unfamiliarity of the spectra was the result of an enormous red shift and that the lines were familiar ones that ought to be in the ultraviolet section of the spectrum.
		While new technologies have led to the construction of larger telescopes based upon techniques not known in 1948, the Hale reflector remains in the forefront of research in the fields of astronomy and astrophysics and is the largest successful reflecting telescope in the world today.
	www.cr.nps.gov /history/online_books/butowsky5/astro4e.htm (2759 words)

	OpticsPlanet.com - FREE UPS on telescopes, microscopes, cameras, binoculars, night vision, radar guns, rangefinders, ...
		Reflector telescopes produce good images and are favored by astronomers who need the largest possible telescope to find distant, faint objects beyond our solar system (deep-sky objects).
		Refractor telescope is an optical system that utilizes a series of glass lenses to refract or bend the light from a distant object such that it can be focused to a point and magnified by an eyepiece.
		The magnification of a telescope is determined by dividing its focal length by the focal length of the eyepiece being used.
	www.opticsplanet.com /info/telescopes (6097 words)

	Earth Based Telescopes
		It works the same way as the reflector telescope does except it has a glass lens instead of a mirror, and the eyepiece is located in a different area.
		A finder scope is a very small mini telescope placed on top of either the reflector telescope or the refractor telescope.
		The power of a telescope is determined by the size of the mirror or lens it uses.
	library.thinkquest.org /J002741/Earth_Based_Telescopes.htm (589 words)

	Howstuffworks "How Telescopes Work"
		Reflectors have large light gathering capacities, and can produce bright images of faint, deep-sky objects for visual observing as well as astrophotography.
		One disadvantage of reflectors is that you occasionally have to clean and align the mirrors.
		In addition, all reflectors are subject to some light loss, for two reasons: First, the secondary mirror obstructs some of the light coming into the telescope; second, no reflective coating for a mirror returns 100 percent of the light striking it -- the best coatings return 90 percent of incoming light.
	science.howstuffworks.com /telescope3.htm (662 words)

	reflector concept from the Astronomy knowledge base (Site not responding. Last check: )
		The refocussed beam passes through a central hole cut into the primary mirror and emerges behind the primary., Telescope devised by Cassegrain in which an auxiliary convex mirror reflects the magnified image, upside down, through a hole in the center of the main objective mirror - i.e., through the end of the telescope itself.
		Newtonian (1 kind, 21 facts) - A class of reflecting telescope developed by Sir Issac Newton with a paraboloidal primary mirror and a small, plane secondary mirror at 45°; to deflect the focus of the primary to a position outside the tube near the top of the telescope.
		Very wide-field performance for surveys., A type of reflecting telescope (more accurately, a large camera) in which the coma produced by a spherical concave mirror is compensated for by a thin correcting lens placed at the opening of the telescope tube.
	www.site.uottawa.ca:4321 /astronomy/reflector.html (476 words)

	Mount Wilson Observatory
		It was the largest telescope in the world from 1917 to 1948 when the 200-inch telescope was built on Palomar Mountain 90 miles to the southeast.
		The first optical interferometer ever used for astronomical research was used on the 100-inch telescope to measure the sizes of distant stars for the first time in 1919.
		Located on the ground floor of the 100-inch telescope dome, the Aluminizing Room is used to recoat all of the telescope mirrors at the observatory.
	www.mtwilson.edu /vir/100 (291 words)

	Toys "R" Us - Edu-Science 600 Reflector Telescope
		Reflector telescope has a reflecting mirror that is 76mm.
		Reflector telescope has fine adjustment and comes with an alt-azimuth...(read more)
		Reflector telescope has fine adjustment and comes with an alt-azimuth tripod that is 114 cm (45"), aluminum tripod, 8 slot accessory tray, screwdriver, space map, and instruction manual.
	www.toysrus.com /sm-edu-science-600-reflector-telescope--pi-2330765.html (186 words)

	Telescope: Melbourne Reflector
		In 1862, authorities in Victoria, Australia decided to build a large telescope to study the Southern nebulae — cloudy patches in the sky whose nature was still unknown.
		A committee of telescope-makers and astronomers, including Lord Rosse, was formed to decide on the design of this telescope, whose view of the southern sky would help complete the picture of the heavens.
		The members assumed that the silver layer of a glass mirror would tarnish faster than a metal mirror, that the silver might disintegrate or be damaged by the weather, and that such a large, heavy, glass mirror would be difficult to manipulate.
	amazing-space.stsci.edu /resources/explorations/groundup/lesson/scopes/melbourne/index.php (156 words)

	Vanns.com: Meade DS2130LNT Newtonian Reflector Telescope, 130 mm (5.1"), Computer Controlled, Short Tube (DS-2130LNT) ...
		This telescope is not only a high-resolution visual observing instrument but also is fully qualified for the more advanced areas of astronomy, including long-exposure CCD-imaging and astrophotography.
		All Meade Digital Series telescopes resolve to the theoretical limits of their respective apertures, which is a fancy way of saying they grab all the light they can, so you have a better view.
		One of the most important advances in telescope design in the past 25 years is the AutoStar Computer Controller (Meade #494) that now includes a high-precision internal time chip and compass/bubble level, and provides location and tracking features previously available only on much more expensive telescopes.
	www.vanns.com /shop/servlet/item/features/411999151 (1267 words)

	Telescope.org Sponsored by ScopeTronix
		are the type of telescope with a lens on the sky end, and an eyepiece at the opposite end.
		The reflector uses a concave mirror to focus light to a point, which is then refocused using the eyepiece.
		Reflectors look strange to the average person because the observer looks through an eyepiece on the side of the tube, instead of at the end.
	www.scopetronix.com /telescopes/ttypes.htm (706 words)

	Building an Equatorial Mount Reflector Telescope
		The size of the telescope makes using the slow motion control knobs a bit awkward as the distance between the eyes and an outstretched hand in some cases is smaller than the distance between the eyepiece and the knob!
		Lie the telescope tube (with an eyepiece and finderscope mounted) on a table.
		The overall weight of the mount and telescope (without the pedestal) should be in the order of 30kg (depending on the weight of the mount).
	www.geocities.com /ejjbee/Equatorial_mount.htm (6417 words)

	eBay: 200mm Reflector telescope on EQ5 mount parabolic mirror (item 7582155059 end time Apr-10-07 19:32:43 PDT) (Site not responding. Last check: )
		So while a company may make telescope for the big names, if there is a huge prices difference between the "big guys" and an off brand telescope there will probably be a difference in optical quality.
		A telescope or eyepiece that does not give clear images, wobbles to the point of not being useful, or breaks easily will not be an instrument you want to use.
		While a person who purchases a telescope or accessories that give clear images, is stable when viewing and works well night after night continues to explore the universe.
	cgi.ebay.com /200mm-Reflector-telescope-on-EQ5-mount-parabolic-mirror_W0QQitemZ7582155059QQcategoryZ28181QQcmdZViewItem (1143 words)

	Telescope for astronomy: refractor, reflector, its design : Etacude.com
		Due to unimaginable size of the universe, telescope is still the only instrument astronomers can rely on to study distance planets, stars, galaxies and nebulas.
		Telescopes are just like eyes: They collect light (either given off or reflection) from objects.
		A refractor telescope consists of an object glass placed at front end of a telescope tube and collects light from the object to be observed.
	sciencepark.etacude.com /astronomy/telescopes.php (540 words)

	Re: Celestron Powerseeker 114 Reflector Telescope, waste of money or decent for beginner? - Astronomy.com Forums
		The mirrors/optics are fine for a telescope of that size and class.
		Most often the advertised magnification for a telescope is on the liberal side of the equation.
		Regardless of what telescope you go with, you need to set your telescope and equipment up early enough to allow it plenty time to equalize to the outdoor temperature.
	www.astronomy.com /ASY/CS/forums/331670/ShowPost.aspx (1909 words)

	Meade Reflector Telescope, and other Meade Reflector Telescope information (Site not responding. Last check: )
		This large 4.5 inch aperture reflector telescope is excellent for deep sky viewing...
		Meade Starfinder Dobsonion 16'/1830mm f/4.5 Newtonian Reflector Telescope...
		Meade Polaris Telescope 114mm - Telescopes at Shopping.com!
	www.maxiscopes.co.uk /directory/meade-reflector-telescope.html (462 words)

	REFLECTOR TELESCOPE (Site not responding. Last check: )
		Fotar brings the universe to you with the 675 max power Astral Observer reflector telescope.
		This equatorial mount telescope is designed to move in any direction making it ideal for tracking celestial bodies across the sky.
		With 675x magnification this telescope will let you observe everything from the rings of saturn to the Andromeda Galaxy.
	www.onlinewaterstore.com /specialty/REFLECTOR-TELESCOPE.htm (129 words)

	Newtonian and Dobsonian reflector telescopes, information from David Hinds Ltd
		Newtonians (also known as catoptrics) usually use a concave parabolic primary mirror to collect and focus incoming light onto a flat secondary (digital) mirror that in turn reflects the image out of an opening at the side of the main tube and into the eyepiece.
		In summary a small reflector is the best general purpose telescope for beginners as they are good on all types of objects and for starting astrophotography.
		If you wish for the ultimate planetary telescope, and also a scope which is virtually maintenance free then look no further than a refractor.
	www.dhinds.co.uk /pages/newtonian-reflector.php (378 words)

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