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	Reflecting telescope - Wikipedia, the free encyclopedia
		The Schmidt camera, invented by Bernhard Schmidt, is not technically a telescope since the light path does not exit to an eyepiece.
		On smaller telescopes, and camera lenses, the secondary is often mounted on an optically-flat, optically-clear glass plate that closes the telescope tube.
		The spherical aberration is overcome by using a corrector lens in front of the telescope at the radius of the curvature of the mirror.
	en.wikipedia.org /wiki/Reflecting_telescope (1658 words)

	Wayne Schmidt's Telescope Making Page
		The telescope I use is a binocular with eight-inch f8 mirrors for objectives.
		The altitude bearings would be be fixed to the telescope tube in such a position and be of such a size so that their centers coincided with the center of gravity of the scope.
		The telescope I used for this mount was rather novel in itself, it was an unobstructed, f9, 6-inch off-axis paraboloid.
	www.waynesthisandthat.com /telescop.htm (5338 words)

	National Park Service: Astronomy and Astrophysics (Palomar 48-inch Oschin (Schmidt) Telescope)
		The 48-inch Schmidt telescope (Oschin telescope) at the Palomar Observatory is a standard Schmidt camera telescope using both lenses and mirrors to create a wide field of view for photographing large sections of the sky at one time.
		The telescope was manufactured in the Caltech machine shops and consists of a tube 20 feet long in a fork-type mounting which allows the telescope to sweep all parts of the sky from the north pole to as far south as declination minus 45 degrees.
		Schmidt designed the plate to refract the light passing through it in such a way as to make up for the spherical aberration introduced by the mirror, without introducing visual errors such as chromatic aberrations commonly found in large reflectors.
	www.cr.nps.gov /history/online_books/butowsky5/astro4f.htm (1472 words)

	World Almanac for Kids
		TELESCOPE, a lens, mirror, or other reflecting surface used to form an image of a distant object, together with a microscope, for the observer, a photographic camera, or some form of spectroscopic apparatus.
		The mirrors for reflecting telescopes were usually made of speculum metal, a mixture of copper and tin, until the German chemist Baron Justus von Liebig discovered the method of depositing a film of silver on a glass surface.
		In England, telescopes were mounted by having the polar axis supported at each end, but the German system, in which the mounting is in the center and the weight of the telescope is balanced by counterpoises, is not generally used for large refractors, and a modified form is employed for reflectors.
	www.worldalmanacforkids.com /explore/space/telescope.html (1180 words)

	Curtis Schmidt Telescope (Site not responding. Last check: 2007-10-08)
		The Curtis Schmidt telescope is a 0.61/.91 meter diameter Schmidt telescope located at the Cerro Tololo InterAmerican Observatory, about 500 km north of Santiago, Chile.
		This telescope was originally installed at the University of Michigan's Portage Lake Observatory in 1950, and moved to the much clearer skies of north central Chile in 1966.
		Two thirds of the time on this telescope is available to US and Chilean astronomers, with the remaining one third reserved for astronomers from the Dept. of Astronomy at the University of Michigan.
	www.astro.lsa.umich.edu /obs/schmidt/schmidt.html (129 words)

	The Brorfelde Schmidt Telescope
		The telescope was installed in the dome in spring 1966 and soon after the test started.
		After a long break, the telescope was tested during the season 1973/1974, and finally in 1975 the regular obsevations could start, using 150 x 150 x 1 mm photographic plates, with a field of 5°.2 on which it vas possible to reach stars down to mag.18.5.
		In 1991 it was again desided to modify the telescope, and during 1991/1992 the telescope was equipped with a JPL GRAF/Cassini 1024 x 1224, 12 micron pixel CCD camera which replaced the photographic system.
	www.astro.ku.dk /~ijaf/schmidt/schmidt.html (525 words)

	The Schmidt telescope (from telescope) -- Encyclopædia Britannica
		In 1930 Bernhard Schmidt, an optician at the Hamburg Observatory in Bergedorf, Ger., designed a catadioptric telescope that satisfied the requirement of photographing larger celestial areas.
		telescope in which a spherical primary mirror receives light that has passed through a thin aspherical lens, called a correcting plate, that compensates for the image distortions—namely, spherical aberrations—produced by the mirror.
		The Schmidt telescope is thus a catadioptric telescope; i.e., its optics involve both the reflection and refraction of light.
	www.britannica.com /eb/article-44209?tocId=44209 (815 words)

	Meade Instruments Corporation - 8" and 10" LX200GPS
		Observing in the main telescope, use the 16x or 64x sidereal speed to place the object in the center of the field.
		The telescope's flash memory may be upgraded through one of the RS-232 ports with new software or data as they become available on the Meade website.
		Alternately, telescope powering may be effected from an automobile cigarette lighter plug (using the optional #607 Power Cord) or from a standard home outlet (using the optional #547 AC Adapter).
	www.meade.com /catalog/lx/8_10_lx200gps.html (2062 words)

	Schmidt telescope -- Encyclopædia Britannica
		During the 1960s, when astronomers turned their telescopes toward the sources of radio signals that had recently been detected, faint, starlike objects were seen.
		U.S. football player and coach Joseph Paul Schmidt was born in Pittsburgh, Pa. After attending the University of Pittsburgh, where he played with the Panthers, Schmidt joined the Detroit Lions as a linebacker in 1953.
		Lecture on the evolution of the telescope discovered by this Italian natural philosopher, astronomer, and mathematician who made fundamental contributions to the sciences of motion, astronomy, and strength of materials.
	www.britannica.com /eb/article-9066173?tocId=9066173 (858 words)

	How to Buy a Telescope. How to select and get the best telescope deal. Telescopes feature reviews
		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.
		Astronomical refractor telescopes can be used as spotting scopes for terrestrial observations when they use or incorporate some type of image-erecting prism system (either Porro or roof prism) in the optical tube between these two lenses.
		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 (6117 words)

	Astronomy - Buying a telescope - Michael E. Bakich
		The Cassegrainian reflector is a type of reflecting telescope with a parabolic primary mirror and a hyperboloidal secondary mirror.
		The Schmidt telescope had a spherical primary mirror at the back of the telescope, and a glass corrector plate in the front of the telescope to remove spherical aberration.
		This telescope (or "Schmidt camera," as it is often called) is used for photography by placing photographic film (or a CCD camera) at the prime focus.
	www.astronomy.com /asy/default.aspx?c=ss&id=9 (3360 words)

	UK Schmidt Telescope (Site not responding. Last check: 2007-10-08)
		The UK Schmidt Telescope (UKST) is a special purpose camera, a survey telescope with a very wide-angle field of view.
		This 1.2m telescope was commissioned in 1973, and became part of the AAO in 1988.
		The telescopes of the Anglo-Australian Observatory have together discovered and confirmed more distant quasars, the most energetic but often the most distant objects in the Universe.
	www.aao.gov.au /ukst/intro.html (216 words)

	Telescopes at the Brorfelde Observatory (Site not responding. Last check: 2007-10-08)
		The Brorfelde Observatory was until January 1st 1996 a branch of the Copenhagen University Observatory (CUO) with a number of telescopes, a mechanical workshop building telescopes and instruments and half a dozen of CUOs scientists working here on a daily basis.
		There are presently four operational telescopes at Brorfelde: The Brorfelde Schmidt Telescope (dome to the upper left), two Cassegrain focus reflectors with 0.40 m (dome to the lower left) and 0.25 m (dome near the center) aperture and an old transit circle (dome to the lower right).
		The Schmidt telescope was for many years operated as a normal Schmidt camera obtaining high quality images of 5 degree sky patches.
	www.astro.ku.dk /~michael/telescope/bror.html (352 words)

	Inventions: Telescopes - EnchantedLearning.com
		Lippershey (1570?-1619) was a German-born Dutch lens maker who demonstrated the first refracting telescope in 1608, made from two lenses; he applied for a patent for this optical refracting telescope (using 2 lenses) in 1608, intending it for use as a military device.
		A Schmidt-Cassegrain telescope (SCT) is a wide-angle reflecting telescope with a correcting lens that minimizes spherical aberration and a concave mirror that receives light and focuses an image.
		The Cassegrain telescope (named for the French sculptor Sieur Guillaume Cassegrain) was developed in 1672; the correcting plate (a lens) was added in 1930 by the Estonian astronomer and lens-maker Bernard Schmidt (1879-1935).
	www.enchantedlearning.com /inventors/page/t/telescope.shtml (705 words)

	Burrell Schmidt User's Manual (Site not responding. Last check: 2007-10-08)
		The Burrell Schmidt telescope is used primarily with a large-format CCD for wide-field imaging.
		The Burrell Schmidt telescope is a 0.61/0.9m f/3.5 telescope with a plate-scale of 96.6"/mm and a direct CCD camera.
		The corrector of the Burrell Schmidt is figured to provide seeing-limited images over the wavelength range 3500-11000 A. The Burrell Schmidt is operated manually rather than by computer aid, with setting circles rather than encoders.
	smaug.astr.cwru.edu /intro.html (277 words)

	Compare Prices and Read Reviews on Meade LX200GPS 10 in. Schmidt-Cassegrain Telescope at Epinions.com
		The Meade LX-200 is a solid computerized telescope that can locate any object in it's 65,000 object database, or more if connected to a computer, at the touch of a button.
		The telescope need only be set up by pointing it to one or two known stars and making sure that the date, time, and location are correct.
		telescope and 35mm camera as long as it's correctly balanced, which requires an optional counterweight system.
	www.epinions.com /content_59135725188 (1355 words)

	Astro Stuff - Meade® 16" LX200GPS Schmidt-Cassegrain Telescope (Site not responding. Last check: 2007-10-08)
		The telescope is manufactured in four basic modules (optical tube assembly with Declination housings attached; fork arm system; drive base; and field tripod) and, as such, is readily transported and set-up in the field by two adults in about 10 minutes.
		Digital data fed from the telescope's microprocessor to the Field De-rotater permit precise and continuous update of the de-rotation required to maintain pinpoint star images throughout the field.
		The advantage of such a system is that the telescope may be remotely aligned and operated over an arbitrarily long distance, through a modem link to the telescope's RS-232 serial interface.
	www.astrostuff.com /Meade16LX200GPS_SchmidtCassegrainTelescope.htm (1268 words)

	Astronomers Take Search for Earth-Threatening Space Rocks To Southern Skies (Site not responding. Last check: 2007-10-08)
		The telescope is used for the Siding Spring Survey, the southern hemisphere counterpart to UA's Catalina Sky Survey.
		The SSS plan is to use the 1-meter (40-inch) telescope for part of the month to quickly confirm suspect asteroids detected with the Uppsala, freeing the smaller telescope to continue it searches.
		The Uppsala Schmidt telescope was built in the 1950s for Uppsala Observatory in Sweden.
	uanews.org /cgi-bin/WebObjects/UANews.woa/4/wa/SRStoryDetails?ArticleID=8916 (943 words)

	Evolution of the Maksutov-Cassegrain Telescope by John F. Gills, Ph.D. (Site not responding. Last check: 2007-10-08)
		This was in 1930 when an Estonian astronomer, lens and mirror maker, Bernard Schmidt, developed a lens called a 'corrector plate' that would compensate for the Cassegrain's optical distortion - specifically it corrected for spherical aberration.
		In the Schmidt Camera, a curved photographic plate holder was positioned at the focal plane of the main mirror for maximum sharpness.
		Later the Schmidt Corrector Plate was applied to the Cassegrain design and the Schmidt-Cassegrain Telescope was born.
	www.weasner.com /etx/guests/mak/MAKSTO.HTM (414 words)

	Mersenne-Schmidt Telescope Article (Site not responding. Last check: 2007-10-08)
		Compared with the three-mirror telescope previously described, the images are worse, though still very much smaller than the seeing usually experienced in a ground-based telescope, the tube length is nearly 25% longer, and the secondary mirror is more aspheric and therefore more difficult to figure.
		The Schmidt camera with an achromatic corrector is an excellent survey instrument, but is impractical in sizes much larger than the Palomar and UK Schmidts, because of the size of the dome required.
		A new design of survey telescope is presented which is more compact, has a larger relative aperture, and has a larger field that most earlier designs.
	www.fortunecity.com /marina/manatee/1879/mersenne/mersntop.htm (420 words)

	Company Seven \| Celestron C-14 "Fastar" Schmidt-Cassegrain Telescope Optical Tube Assembly
		The telescope retains its full visual capabilities at f11, and can also accommodate a variety of optional lenses at the axial port to vary the effective focal length and f ratio as fast as f4.
		The Fastar equipped telescopes incorporate a machined Secondary Mirror Holder with thread on retaining ring instead of the original plastic holder that was cemented onto the Corrector Lens.
		And for a time Celestron was selling this telescope on the However, we are concerned that the Losmandy G-11 mount capacity with the C-14 OTA payload approaches the practical limits of use ability, and crosses the line for astronomical imaging, particularly if the telescope is to be employed at unsheltered, wind prone environments.
	www.company7.com /celestron/products/sch13.html (1663 words)

	AllRefer.com - Schmidt telescope (Astronomy, General) - Encyclopedia
		AllRefer.com - Schmidt telescope (Astronomy, General) - Encyclopedia
		You are here : AllRefer.com > Reference > Encyclopedia > Astronomy, General > Schmidt telescope
		More articles from AllRefer Reference on Schmidt telescope
	reference.allrefer.com /encyclopedia/X/X-Schmidtt.html (119 words)

	Company Seven \| Celestron Celestar 8 Schmidt-Cassegrain Telescope
		The Celestar 8 telescope is a very light weight and economical 8" Schmidt-Cassegrain telescope with a nominal focal length of 2032mm (f/10).
		Additionally, if you plan to pack the telescope in and out of a carrying case with a 50mm finder then we suggest you buy an optional finderscope quick release bracket which will allow easier alignment of the telescope and finder.
		And beginning in May 1998 all worm gear driven Celestron 8 telescopes not including the basic Celestar 8 telescope are equipped with an interchangeable secondary mirror holder to permit the installation of an optional "Fastar 8" CCD camera holder.
	www.company7.com /celestron/products/sch4.html (1519 words)

	Schmidt-Cassegrain (Site not responding. Last check: 2007-10-08)
		By folding the light path a Schmidt- Cassegrain telescope (or SCT) is much more compact than an equal-aperture refractor or Newtonian.
		All of the professional telescopes built recently, from Hubble to Keck, are based on the folded Cassegrain design.
		Maksutov-Cassegrain telescopes are similar to SCTs but have a much more highly curved correcting lens on the front of the scope.
	www.starizona.com /basics/sct.html (233 words)

	Meade Instruments Corporation - 8" LX90
		One evening I centered the Whirlpool Galaxy, M51, in the eyepiece and let the scope track unattended as the galaxy rose in the northeast and passed near the zenith.
		Unlike the hand controllers included with competing 5" and 8" SCT's (and which require disassembly of the telescope electronics for memory upgrade), Autostar is fully upgradeable over the Internet: add the positions of new comets, update the positions of Earth satellites, even add new software as it becomes available.
		The telescope may also be powered from an automobile cigarette lighter plug or from standard 115vAC home outlets, using optionally available power cords.
	www.meade.com /catalog/lx/lx90.html (863 words)

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