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Topic: Adjustable Ranging Telescope

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Telescopic sight

Sniper

M24 SWS

M14 (rifle)

M1 Garand

United States Army

	The Space Telescope: Scientific American 1982
		With suitable instrumentation the Space Telescope should be able to respond to electromagnetic waves ranging in length from about 115 nanometers (billionths of a meter) in the far-ultraviolet region of the spectrum to about a million nanometers (or one millimeter) in the far-infrared.
		Incoming light passing along the optical axis of the telescope is directed outward at a right angle by means of a flat ``pick-off'' mirror held by a rigid arm at a 45-degree angle to the optical axis.
		OPTICAL PATH in the Space Telescope is said to be folded: light from the concave primary mirror is reflected from the convex secondary mirror and passes through a hole in the center of the primary before coming to a focus at the image plane in the instrument section several feet behind the primary.
	ecf.hq.eso.org /poa/FOS/hstsciamerspitzer.html (8399 words)

	Adjustable Ranging Telescope - Wikipedia, the free encyclopedia
		Developed and patented by James M. Leatherwood, the Adjustable Ranging Telescope (ART) system combines a rangefinding scale inside the telescopic sight (scope) with an adjustable cam built into the scope's mount that raises or lowers the rear of the sight to compensate for the trajectory of the bullet.
		Their major problem was that the classic training of a sniper in range estimation, ballistics, compensation for weather or climate variables, and precision shooting is a lengthy process and they didn't have the time.
		The combination of the Leatherwood ART with M-14 National Match rifles to produce what became the M21 Sniper Rifle, allowed the Army to place competent snipers in the field with all line units.
	en.wikipedia.org /wiki/Adjustable_Ranging_Telescope (298 words)

	Making a Newtonian Telescope
		The clear aperture of a telescope is the diameter of the objective lens or primary mirror specified in either inches or millimeters (mm).
		The exit pupil of a telescope is the circular beam of light that leaves the eyepiece being used and is measured in mm.
		This is the ratio of the focal length of the telescope to its aperture.
	www.altair.org /bluenewt.html (4559 words)

	MSN Encarta - Search View - Mars (planet)
		The darker areas of Mars’s surface may look greenish to the telescope observer, but this is an optical illusion caused by the contrast in color between the dark patches and the redder, brighter areas.
		The telescope also has enabled spectroscopic measurements that provide comprehensive information on atmospheric chemistry and on the nature and variability of ices and minerals on the surface.
		As telescopes improved, however, and as it became possible to record photographs of Mars on film instead of relying on human vision alone, astronomers found it more and more difficult to see repeatable evidence for Lowell’s canals.
	encarta.msn.com /text_761566582__1/Mars_(planet).html (6495 words)

	NationMaster - Encyclopedia: M21 (rifle) (Site not responding. Last check: 2007-10-27)
		As a result, in 1969, the Rock Island Arsenal converted 1,435 National Match (target grade) M14 rifles by adding a Leatherwood 3-9x Adjustable Ranging Telescope (ART) telescopic sight and furnishing National Match grade ammunition.
		Developed and patented by James M. Leatherwood, the Adjustable Ranging Telescope (ART) system combines a rangefinding scale inside the telescopic sight (scope) with an adjustable cam built into the scopes mount that raises or lowers the rear of the sight to compensate for the trajectory of the bullet.
		The M16 was seen as a true "assault" rifle, where it was expected to be used at ranges of well inside 300m and was much more controllable under fully automatic conditions than was the M14.
	www.nationmaster.com /encyclopedia/M21-(rifle) (1011 words)

	"R"
		Range - The distance between the shooter and the target.
		Ranging - The technique that a sniper uses to compensate for bullet trajectory by adjusting the ballistic cam of an adjustable/ranging telescope.
		In telescopic sights, the element which is optically referred to the target.
	www.snipercountry.com /compendium/Comp_R.htm (1047 words)

	Short STORIES OF INTERESTING EXHIBITS
		One whole building is devoted to the graphic arts, and another for a workshop because of the strides that have been made in printing, engraving and the kindred arts within the last few years.
		The gas stove, which in tidiness is a great improvement over the cumbrous coal range has been supplemented by a portable water heater which will heat a gallon of water over one hundred degrees in a minute; the temperature to be regulated by increasing or decreasing the amount of water.
		Adjustable steel valves on floors make it possible to discharge on either side, on both sides at once, on either or both sides of the centre, or on both sides and centre at the same time.
	panam1901.bfn.org /documents/worldsworkdoc.html (12533 words)

	[No title]
		The five adjustable mirrors are mounted in a coude optical path.
		It is used by the mount operator to position the receive telescope for tracking or collimation.
		Since the receive telescope defines the optical mount axis, the sighting telescope is adjusted for initial collimation with the receive telescope.
	www.hartrao.ac.za /geodesy/slr/tmcinfo.html (1533 words)

	The Space Telescope
		With suitable instrumentation the Space Telescope should be able to respond to electromagnetic waves ranging in length from about 115 nanometers (billionths of a meter) in the far-ultraviolet region of the spectrum to about a million nanometers (or one millimeter) in the far-infrared.
		The tube of the telescope extends more than 10 feet in front of the secondary in order to shield the optical system from stray light, most of which is direct light from the sun and scattered sunlight from the earth and the moon.
		OPTICAL PATH in the Space Telescope is said to be folded: light from the concave primary mirror is reflected from the convex secondary mirror and passes through a hole in the center of the primary before coming to a focus at the image plane in the instrument section several feet behind the primary.
	www.sns.ias.edu /~jnb/Papers/Popular/Hstsciamerspitzer/hstsciamerspitzer.html (8407 words)

	Adjustable Shelves (Site not responding. Last check: 2007-10-27)
		Adjustable spanner 1: 3: There are many forms of the '''adjustable spanner''' or '''wrench''' or '''shifting spanner 7: There is also a class of adjustable that automatically adjusts to the nut size.
		Adjustable rates transfer part of the interest rate risk fro 3: y common in Australia and New Zealand.
		Adjustable Ranging Telescope 1: e inside the telescopic sight (scope) with an adjustable cam built into the scope's mount that raises
	www.elusiveeye.com /side406-adjustable-shelves.html (329 words)

	Universally adjustable ranging target and retro-reflector housing bracket - Patent 4311382
		Consequently, the remotely located target prism combination should be adjustable in azimuth and elevation to permit the user to adjust the reflector face until it is substantially normal to the incoming energy to maximize the level of reflected infrared or laser energy available to the receiver.
		Such devices may be adjusted in elevation and in distance H between the target center and the prism center to render the combination compatible with the corresponding distance H between the sighting telescope and ranging optics of any of a large plurality of electronic distance measuring instruments.
		Thus, unlike the prior art referred to previously, the present invention provides a target and housing bracket which is compatible with a plurality of prism assemblies and electronic distance measuring instruments and thus overcomes the substantial disadvantages of the prior art.
	www.freepatentsonline.com /4311382.html (3546 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.
		The telescope moves to that object and centers it in the field of view...
	www.optcorp.com /info_catadioptric.aspx (1336 words)

	Universally adjustable ranging target and retro-reflector housing bracket - Patent 4343550
		It will be understood by those having skill in the art to which the present invention pertains that the distance H between the center point of the target and the center point of the reflective device remains constant in the embodiment of the invention illustrated in FIGS.
		This constant distance between the ranging path and target path is desirable when the invention is used with an electronic distance measuring instrument in which the electro-optics and targeting telescope are configured relative to one another to rotate in combination about a single axis as illustrated in FIG.
		This apparent reduction is equal to the reduction between ranging path and target path as the elevation angle increases because of the independent axes of rotation of the electro-optics and telescope portion of the electronic distance measuring instrument as viewed in FIG.
	www.freepatentsonline.com /4343550.html (4263 words)

	Adjustable Ranging Telescope (Site not responding. Last check: 2007-10-27)
		Developed and patented by James M. Leatherwood, the Adjustable Ranging Telescope (ART) system combines a rangefinding scaleinside the telescopic sight (scope) with an adjustable cam built into the scope's mount thatraises or lowers the rear of the sight to compensate for the trajectory of thebullet.
		In use, the shooter first estimates the range utilizing the scale or scalesvisible through the scope, then adjusts the cam to that specific range.
		Their major problem was that the classic training ofa sniper in range estimation, ballistics, compensation for weather or climate variables, and precision shooting is a lengthy process and they didn't havethe time.
	www.therfcc.org /adjustable-ranging-telescope-357995.html (268 words)

	Newton Telescope
		Contrast may be defined as the dynamic range of the image field, or the ratio between the high and low intensity parts of the image.
		Therefore, for this telescope a more deterministic approach is taken; the glass is fairly thin and can be brought to thermal equilibrium quickly by means of a fan.
		Focuser height ranges from 36 to 66 mm measured from outside tube surface, so the focal plane should be located about 50 mm outside the tube.
	www.atmsite.org /contrib/Marvelde/gettingStarted (2988 words)

	wikien.info: Main_Page (Site not responding. Last check: 2007-10-27)
		Developed and patented by James M. Leatherwood, the Adjustable Ranging Telescope (ART) system combines a rangefinding scale inside the telescopic sight (scope) with an adjustable cam built into the scope's mount that raises or lowers the rear of the sight to compensate for the trajectory of the bull..
		An adjustable rate mortgage or variable rate mortgage is a loan secured on a mortgage whose interest rate and so monthly repayment vary over time.
		Adjustable spanner There are many forms of the adjustable spanner or wrench or shifting spanner, from the taper locking spanners which needed a hammer to set the moveable jaw to the size of the nut, to the modern screw adjusted spanner.
	www.alanaditescili.net /browse.php?title=A/AD/ADJ (1357 words)

	M-21 Sniper Rifle
		The XM21 was an accurized M14 National Match (NM) semi-automatic rifle equipped with a Leatherwood 3X-9X Adjustable Ranging Telescope (ART).
		The ART telescope featured a variable magnification power of from 3X to 9X, for adjustable ranging between 300m and 900m.
		This adjustable ranging feature removed much of the guesswork from aiming at the target.
	www.lcompanyranger.com /usweapons/sniperiflepage.htm (340 words)

	Telescopes Retail Telescope Sales Binoculars Sale Binocular Retailer
		Our Refractor telescope sizes are 50mm, 60mm, 70mm 80mm, 90mm, 100mm, 102mm, 120mm, 127mm and 152mm objective lens diameter.
		We are also dealers/retailers for the complete Konus range of telescopes, binoculars and other astronomical products, including Refractors, Newtonian Reflectors, Catadioptric Maksutov Cassegrain and a whole host of accessories.
		We also are a dealer/retailer for the Saxon range of products including telescopes, binoculars, CCD cameras as well as many other astronomical products and accessories.
	www.aoe.com.au (815 words)

	- Southern African Large Telescope - NEWS (Site not responding. Last check: 2007-10-27)
		The telescope is tilted 37 degrees from the zenith: the choice of angle being a compromise between maximising sky coverage and minimizing airmass.
		Thus during an observation the steel super-structure of the telescope is stationary, and only the ~5 tonne tracker and payload moves to follow an object.
		The telescope can track objects as they cross this annulus, with viewing times ranging from ~50 min to 3 hours, depending on declination (southerly objects can be observed for longer).
	www.salt.ac.za /content/news/e_news.htm (2435 words)

	Meade Scopes: Saturn Telescopes, DS-2000, Telestar Telescopes, Polaris Telescopes, Autostar, Refracting Telescopes, ...
		Identical in operating characteristics to the Autostar controller available for the Meade ETX-70AT telescope, Autostar for DS telescopes is easy to use, even for the beginner who has never before operated a telescope.
		While all of the foregoing objects may be easily viewed through the Meade DS-2070AT, the larger apertures of the Meade DS-2114ATS and DS-2130ATS telescopes show all of these objects in greater resolution and in wider extension, in proportion to the additional aperture and light-collecting area of the telescope.
		Electronic Control Panel of Meade DS-2000 Digital Series Telescopes: The standard-equipment Autostar handbox plugs into the HBX port; the AUX port is used to power optional electronic accessories such as the #1240 Electric Focuser.
	www.meade.com /catalog/ds2000/ds_meade.html (1265 words)

	Worldwide Elite Forces Homepage :: Worldwide Elite Forces
		The system incorporates an adjustable rear sight which corrects for both windage and elevation, a heavier barrel with 1-in-7 rifling, and a muzzle compensator to prevent muzzle climb during burst operation.
		The range quadrant is graduated in 25-meter increments from 50 to 400 meters.
		Though the range is not marked on the sight in meters, the sight is graduated in 50-meter increments from 50 to 200 meters, which are marked with a "1" at 100 meters and a "2" at 200 meters.
	www.freewebs.com /worldwideeliteforces/weapons.htm (3580 words)

	CSM Original Specification
		It would be adjustable to permit changes in body and leg angles and would be so constructed as to allow crewmen to interchange positions and to accommodate a crewman wearing a back or seat parachute.
		The equipment and system should be capable of sustained undegraded operation with supply voltage variation of +15 percent to -20 percent of the normal bus voltage.
		A circuit quality analysis for each radiating electrical system would be required to show exactly how ranging, telemetry, voice, and television data modulated all transmitters with which they were used.
	www.astronautix.com /craft/csmation.htm (3149 words)

	Adjustable Ranging Telescope Definition / Adjustable Ranging Telescope Research (Site not responding. Last check: 2007-10-27)
		Adjustable Ranging Telescope Definition / Adjustable Ranging Telescope Research
		Developed and patented by James M. Leatherwood, the Adjustable Ranging Telescope (ART) system combines a rangefinding scale inside the telescopic sightA telescopic sight is a device used to give an accurate point of aim for a firearm.
		[click for more] (scope) with an adjustable cam built into the scope's mount that raises or lowers the rear of the sight to compensate for the trajectory of the bullet.
	www.elresearch.com /Adjustable_Ranging_Telescope (239 words)

	30 Cal Page (Site not responding. Last check: 2007-10-27)
		It was to have had the same effective range as the M14 rifle it replaced, but it was most effective at a range of 215 yards (200m) or less.
		The M1903 was an accurate rifle with an effective range of 600 yards (550m).
		Leatherwood 3X-9X Adjustable Ranging Telescope (ART) (Copyright The Stackpole Co.)
	www.7point62.com /History/30cal_Page.html (2586 words)

	Telescope-Service: Finderscopes
		Quite often telescopes are sold with cheap, underperforming finderscopes for which the name "finder" might even be questioned.
		Many telescopes have a quick release base (finder shoe) that is compatible with the finder brackets of the 6x30 and 8x50 finders.
		But not every telescope is equipped with a quick release base for finderscopes.
	www.telescope-service.com /ATM/finders.html (2018 words)

	thesni1 (Site not responding. Last check: 2007-10-27)
		Working from a year's improvised sniper activities, USARV staff requested certain rifles and telescopic sights to be issued to all Divisions and Brigades operating in Vietnam, for testing.
		The out-and-out winner of the trials was the M-14 with the ART scope.
		With a suppressor fitted it was almost impossible to pin point the source of the rifle from ranges greater than 75 yards.
	www.diddybop.demon.co.uk /thesni1.htm (1456 words)

	Telescope Mount (Site not responding. Last check: 2007-10-27)
		SKYLAB and the attached Apollo Telescope Mount were launched into near earth orbit by a Saturn V rocket on 14 May 1973.
		To mount the telescope tube Tele Vue Tele-Pod Telescope Mount from bhphotovideo.com
		telescope -> Evolution of Telescopes Refracting Telescopes The first practical telescopes were refracting telescopes produced at the beginning of the 17th cent.
	www.astronomy-now.info /astronomy-telescope/telescope-mount.html (1199 words)

	Edmund Scientific: Astroscan Telescope
		The heart of the Astroscan is its 1/8 wave, overcoated primary parabolic mirror.
		Where other telescopes use an inexpensive spherical mirror, the Astroscan's parabolic mirror has a deeper, more complex figure that focuses all incoming light rays to the same point.
		The wide field-of-view makes finding astronomical objects far easier than with other telescopes and allows for the best views of deep sky objects, or groups of objects, that won't even fit into the fields of other telescopes.
	scientificsonline.com /product.asp?pn=3002001 (462 words)

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