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Topic: Maksutov telescope

	Telescope - Wikipedia, the free encyclopedia
		Radio telescopes are often operated in pairs, or larger groups to synthesize large "virtual" apertures that are similar in size to the separation between the telescopes: see aperture synthesis.
		This means that a telescope with a certain mirror diameter can resolve up to a certain limit at a certain wavelength, so if you want more resolution at that very wavelength, you have to build a wider mirror or perform aperture synthesis using an array of nearby telescopes.
		The telescope was aimed by the aid of a Foucault sidérostat, which is a movable plane mirror with a 2 m diameter, mounted in a large cast-iron frame.
	en.wikipedia.org /wiki/Telescope (2068 words)

	Dmitri Maksutov (Site not responding. Last check: 2007-08-10)
		Dmitri Dmitriyevich Maksutov was born on April 11, 1896, in the Russian city of Nikolayev, and three years later the family moved 70 miles to the port city of Odessa.
		Maksutov was discharged from the hospital soon after the 1917 revolution and almost immediately attempted to emigrate to the United States via China.
		Maksutov's notebooks reveal that in 1936, when he was contemplating Mangin mirrors (lenses with one silvered surface, primarily used in spotlights and lighthouse beacons), he had penciled in the margin a little sketch showing the reflective and refractive elements of a Mangin mirror separated to form a meniscus lens and a mirror.
	tec.idcomm.com /tec_us/company/DmitriMaksutov.html (2779 words)

	Kinds of Telescopes
		This form of telescope used the symmetry of a spherical mirror, and a curved, spherical field of focus at which a curved photographic plate was placed, to allow a telescope with a very wide field to be constructed.
		The objective lens on a refracting telescope, or the aperture of a telescope in general, is acting on behalf of the pupil of your eye when you are looking through the telescope.
		A telescope with an aperture of 6 inches and a focal length of 48 inches is an f/8 telescope, one whose aperture is 1/8th of its focal length.
	www.hypermaths.org /quadibloc/science/opt02.htm (5168 words)

	Maksutov telescope
		A type of catadioptric telescope (an instrument combining mirrors and lenses), developed by the Russian optical specialist Dmitri Maksutov (1896-1964).
		It uses a spheroidal primary mirror, a deeply-curved spheroidal meniscus corrector plate, and a small spheroidal secondary mirror fixed to, or simply silvered on to, the back of the corrector plate, to give a triple-folded optical path.
		The result is a very compact telescope of long focal length that gives a wide field of view and images of excellent quality.
	www.daviddarling.info /encyclopedia/M/Maksutov_telescope.html (194 words)

	Intes Maksutov
		The first telescope from this company was a 6" f/10 unit that could be purchased as an optical tube only, or as a complete telescope.
		Their was no model designation for the telescope initially, but with the announcement of the availability of other sizes in 1993 it was given the name MK63.
		Therefore this telescope was somewhat limited as a spotting scope, but did well as an astronomical telescope.
	home.att.net /~telescopebluebook/other/intes.htm (581 words)

	Telescopes: Meade Telescopes, Meade, Mead, Meade ETX, Mead ETX, Autostar, Autostar Suite, The Planets, Stars, ... (Site not responding. Last check: 2007-08-10)
		With the telescope placed in the altazimuth mode on a table, astronomical object-tracking may be accomplished automatically, after a quick and easy 2-minute alignment of Autostar to the sky.
		Alternately, the telescope may be mounted in either the altazimuth or equatorial modes on the standard-equipment #884 Deluxe Field Tripod.
		TO is pressed, the telescope moves at 5° per second on both axes, simultaneously, to place NGC 6960, the Veil Nebula in the constellation Cygnus, in the telescope's field of view.
	www.meade.com /catalog/etx/etx_mak.html (2660 words)

	Kellner eyepiece (Site not responding. Last check: 2007-08-10)
		Maksutov - In its purest form, an astrographic camera whose objective is a spherical mirror and whose optical defects are corrected by a meniscus.
		Such a lens in the front of a Maksutov telescope cancels out optical defects in the objective mirror.
		Newtonian reflector - A telescope whose objective is a concave mirror and whose flat secondary mirror is tilted 45
	www.singularsci.com /Glossary4.htm (245 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 (3235 words)

	Maksutov (Site not responding. Last check: 2007-08-10)
		In the fall of 2003 several improvements were made to the scope; new coatings to increase the throughput, several minor fixes to allow for better collimation and the addition of a JMI motofocus assembly to eliminate problems with mirror shift.
		Maksutov type telescopes and cameras have long been attractive to amateurs due to the possibility of constructing a well corrected optical system incorporating entirely (or nearly) spherical surfaces.
		Maksutovs employ a weakly diverging but strongly curved and thick lens at some point in the optical path, typically ahead of the primary mirror to produce an amount of spherical aberration that is equal but opposite in sign to that of the remaining optical system.
	www.pyxiscamera.com /Maksutov/Maksutov.html (5568 words)

	Howstuffworks "How Telescopes Work"
		Compound or catadioptric telescopes are hybrid telescopes that have a mix of refractor and reflector elements in their design.
		The Schmidt telescope had a primary mirror at the back of the telescope, and a glass corrector plate in the front of the telescope to remove spherical aberration.
		The telescope was used primarily for photography, because it had no secondary mirror or eyepieces -- instead, photographic film was placed at the prime focus of the primary mirror.
	science.howstuffworks.com /telescope4.htm (246 words)

	Company Seven \| Orion StarMax™ 127 Maksutov-Cassegrain Telescope
		This telescope is a particularly good choice for those in suburban settings who want to glimpse changing features on the brighter astronomical objects, or for nature watching, etc. The telescope can be easily dismounted for use as a spotting telescope or as a 1,540mm ultra telephoto lens.
		The StarMax™ 127 telescope optical tube assembly may be quickly detached from the Equatorial Mount for use as a portable telephoto lens (some sort of support is suggested), or for use as a portable spotting telescope.
		Telescopes such as this often put the eyepiece at position that is only about 3 or 4 feet (0.9 or 1.2 meters) from the ground.
	www.company7.com /orion/catadioptric/starmax127.html (2585 words)

	OPT - Schmidt- and Maksutov-Cassegrains - Model Number: INFO-SCTMAK
		Meade's 7" Maksutov telescope, for instance, has a focal ratio of f/15, but the tube is only slightly longer than the 8" f/10 Schmidt-Cassegrain.
		In fact, most telescopes aren't fast enough on their own, requiring their owners to add "focal reducers" in order to get the extremely wide field of view necessary to do optimum work with a CCD camera.
		There are also telescopes available with dual-axis drive, which means that there are two motors working in tandem so that movement in all four directions (north/south/east/west) is compensated for.
	www.optcorp.com /product.aspx?pid=3853 (1397 words)

	Company Seven \| Orion Argonaut™ 6" Maksutov-Newtonian Telescope
		History of the Mak-Newt: The component that defines the Maksutov telescope is the relatively thick deeply curved "Meniscas" corrector lens which reduces spherical aberration, a spherical Primary Mirror of about f2, and a convex Secondary Mirror (usually an aluminized spot on the Corrector Lens) which imparts magnifications of about 5X.
		The effective focal length of the telescope, and the overall physical length of the Mak-Newt telescope are about that of the focal length of the Primary Mirror.
		Telescopes such as this often put the eyepiece at position that is eay for most people to reach while sitting or standing.
	www.company7.com /orion/catadioptric/argo6.html (2311 words)

	Catadioptric Telescope - OPT Telescopes
		A Catadioptric telescope is the generic term for a closed-tube system where a combination of mirrors and lenses are employed to form an image.
		The Schmidt-Cassegrain telescope is among the most popular of the telescope designs today, simply because of these attributes and the fact that an amazingly wide variety of accessories is available for this most-favorite of telescopes.
		Meade's Maksutov telescope, for instance, is a 7" f15 model, but the tube is only slightly longer than the 8" f10 Schmidt-Cassegrain.
	www.optcorp.com /info_catadioptric.aspx (1348 words)

	Pro-Optic 90mm f.5.6 Maksutov telescope/camera lens
		I used to have the Pro-Optic (sold by Adorama) 90mm f/5.6 Maksutov, which as far as I can tell is the same 'scope as the Orion MAK-500 90 mm, in a different color (white), for less money than Orion wants.
		As an astronomical telescope, it can give you nice wide-field views of all the usual fairly bright nebulae -- views that the folks with the long focal length 'scopes have trouble getting, like Jupiter and M22 in the same field, or M8 and M20 in the same field, or extended objects like M31.
		The two 90mm Maksutovs showed similar amounts of nebulosity, but the view through the C90 was decidedly prettier because the star images were cleaner.
	www.shallowsky.com /pro-optic500.html (661 words)

	Evolution of the Maksutov-Cassegrain Telescope by John F. Gills, Ph.D. (Site not responding. Last check: 2007-08-10)
		The main differences between Cassegrain's design and that of Gregory was that Cassegrain used a convex secondary mirror and moved it inside the focal point of the main mirror.
		In the Schmidt Camera, a curved photographic plate holder was positioned at the focal plane of the main mirror for maximum sharpness.
		Eleven years later, two men, A. Bouwers of Amsterdam, Holland, in February of 1941 and Dmitry Maksutov of Moscow, Russia, in October of 1941 independently conceived the idea of replacing Schmidt's complexly shaped corrector plate with a curved lens, called the Meniscus Corrector Shell.
	www.weasner.com /etx/guests/mak/MAKSTO.HTM (414 words)

	Vanns.com: Celestron NexStar 4GT NexStar GT Series 4" Maksutov-Cassegrain Telescope (NexStar 4GT ) Features
		This telescope combines push button electronic control, ultra-high transmission coatings and the finest optical systems ever available in ultraportable telescopes, to bring you up close and personal with our celestial neighbors.
		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.
		The Maksutov has a thick meniscus correcting lens with a strong curvature and a secondary mirror with an aluminized spot on the corrector.
	www.vanns.com /shop/servlet/item/features/411993586 (1635 words)

	Maksutov Telescope dot COM Home Page (Site not responding. Last check: 2007-08-10)
		MAK telescopes can be used as a spotting scope by simply adding a low cost 45 degree erect image prism.
		The curved lens at the front of the telescope is known as a meniscus.
		The telescope achieves focus my moving the main mirror along the baffle tube in a fashion similar to most Schmidt Cassegrain designs.
	www.maksutov-telescope.com (504 words)

	Telescope-india.com / SKYWATCHER Maksutov - Cassegrain
		The Maksutovs come in apertures of 90mm, 102mm and 127mm, and are available either complete with equatorial mounts and tripods, or as (OTA) optical tube assemblies only, which can be mounted onto a standard photographic tripod.
		These Maksutov telescopes are supplied without a mount.
		Further information on Maksutov telescope and their price, you could talk to us directly.
	www.tejraj.com /maksutov.html (235 words)

	Apex 127mm Maksutov Telescope (Site not responding. Last check: 2007-08-10)
		A Questar telescope pioneered space surveillance in September 1965 aboard the Gemini spacecraft.
		The Apex 127 telescope is shown mounted on the Vixen GP-DX equatorial mount.
		When the telescope is positioned at high atitudes, it can be difficult to observe with a cassegrain or refractor design with the eyepiece rear positioned.
	www.barrie-tao.com /apex127.html (1419 words)

	Telescope Uk (Site not responding. Last check: 2007-08-10)
		Even though the telescope itself is the major portion of the astronomical equipment, it is the eyepiece that make or breaks a telescope's capabilities.
		Some cheap telescopes (in particular 60mm refractors) are nearly impossible to focus and produce dim, fuzzy images that quickly discourage the beginning astronomer.
		Unfortunately, the steadiest, sharpest telescopic views are often had under precisely the atmospheric conditions that cause dew to form.
	www.your-telescope.co.uk (2049 words)

	Antiques - Antique Telescopes (Site not responding. Last check: 2007-08-10)
		Maksutov Cassegrain and Maksutov Newtonian telescopes by owners.
		Stanley London Brass Sextants, Compasses, Telescopes, and Nautical...
		Beautiful used telescopes acquired and for sale by John Niemi, Osaka, Japan.
	www.antiquespeople.com /antiquetelescopes (611 words)

	Sky-Watcher Telescope. What's New
		The Pro-Series is the new generation of professional quality telescopes and mounts of the Sky-Watcher range.
		These telescopes and mounts are manufactured to the highest levels of optical and mechanical precision, resulting in telescopes with exquisite optical performance and finish.
		With this tripod, the Sky-Watcher Table-Top Telescope can be easily converted into a regular telescope with tall tripod legs.
	www.skywatchertelescope.com /WhatsNew.html (1013 words)

	Questar 7" f/15 Maksutov-Cassegrain Telescope
		Total weight of the Questar German mount is only 54 pounds, making transporting to a dark sky sight an easy matter.
		While designed primarily for use with the Questar Seven optical tubes, the mount can also be used with many other telescopes of comparable size and weight.
		For those individuals who appreciate the very finest that life has to offer, a Questar Seven will prove to be an absolutely eye-opening revelation.
	www.escience.ca /telescopes/RENDER/5/1024/3058/11554.html (395 words)

	Nikon Coolpix 990 Digital Camera with Orion Argonaut™ 150mm Maksutov-Cassegrain Telescope
		The telescope mount is an Orion EQ-3 mount with EQ-3M dual-axis DC motor drive.
		Afocal coupling of the Nikon Coolpix 990 to the telescope uses one of the below eyepieces that is designed to screw directly on to the Nikon 990 camera or in the past I used an Universal Camera adapter with a typical eyepiece.
		For Sun imaging an Orion Telescopes and Binoculars full-apertuare glass solar filter is used.
	www.stargazing.net /david/Nikon990/orion150mm.html (196 words)

	Leroy's Maksutov
		I recognize that (Maksutov-)Cassegrain optics' focal length is truly an effective focal length due to varying the separation of the primary and secondary mirrors.
		This telescope is a great lunar and planetary scope.
		I can not see as much detail as in my 12" SCT, but I will be able to use it at times that I would not ordinarily consider setting up the 12".
	home.earthlink.net /~ngc5139/SCI/myMCTs.html (241 words)

	Cassegrain Maksutov Telescope, and other Cassegrain Maksutov Telescope information (Site not responding. Last check: 2007-08-10)
		Evolution of the Maksutov-Cassegrain Telescope by John F. Gills, Ph.D. The 300 Year Evolution of the Maksutov-Cassegrain Telescope...
		Telescopes: Meade Telescopes, Meade, Mead, Meade ETX, Mead ETX, Autostar, Autostar Suite, The Planets, Stars,...
		With the telescope placed in the altazimuth mode on a table...
	www.maxiscopes.co.uk /directory/cassegrain-maksutov-telescope.html (353 words)

	Konus MotorMax 130 Maksutov Cassegrain Telescope (Site not responding. Last check: 2007-08-10)
		Maksutovs, with their long focal lengths make them perfect for high power planetary or lunar viewing and photography.
		just had to write you and tell you what a great telescope the Konus 130 Mak-Cas is. Over the last several nights I have seen more with this scope than the other two that I own, which aren't by any means "quality scopes".
		If anyone asks me where to get a good telescope I'll refer them to you guys and recommend the Konus line of scopes.
	www.digitecoptical.com /tele-konus_maks_1797.htm (445 words)

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