Meade Equatorial Reflectors

More Information  · Supplied Accessories  · Recommended Accessories  · Images of Some Features Price $799.00 List Price $899.00 Supplied Eyepiece SP26 Highest Useful Magnification 254x Visual Limiting Magnitude 13.4 Focal Length 762mm Focal Ratio f/5 Resolution 0.76 arc seconds Aperture 6" Weight 47 lbs. Warranty 1 year

This Telescope’s Optical System . . .

• Newtonian optical tube: 6" aperture (762mm focal length f/5), guaranteed to be diffraction-limited. The primary mirror is made of soda-lime (plate) glass. While a more expensive low thermal expansion Pyrex glass primary offers some theoretical advantages (less need to refocus as the mirror figure changes as the scope drops to the ambient temperature), in real-life terms the advantages are rarely seen in a light-weight 6" mirror. Rather than increasing the price by adding a Pyrex mirror, to gain a modest advantage most people won’t see, Meade elected to keep the price low so that more people could enjoy the excellent views this scope is capable of producing. The optics, made entirely at Meade’s Irvine, CA, optical shop, are mounted in machined aluminum cells that are fitted to a white-enameled steel tube.

• Coated optics: The primary and secondary mirrors are coated with standard 89% reflectivity aluminum and overcoated with quartz for long life.

• Finderscope: 6 x 30mm straight-through achromatic design in a dual ring bracket. Focuses by loosening the trim ring behind the objective lens cell, screwing the lens cell in or out to focus, and tightening the trim ring to lock in the correct focus.

• Focuser: 2" rack and pinion type, with removable 1.25" accessory adapter.

• Eyepiece: 1.25" 26mm Super Plössl eyepiece (29x) with a 1.7° field of view (over three lunar diameters) and a large 5.2mm exit pupil for brilliant, low power rich-field images of nebulas, galaxies, and star clusters. High-power lunar and planetary images, using optional eyepieces and/or Barlows, reveal subtle details that are often lost in telescopes of lesser optical resolution.

This Telescope’s Mount . . .

• Heavy duty LXD75 computerized German equatorial mount: The white-painted mount is machined of aluminum for durability and reliability. Four stainless steel ball bearings support the right ascension and declination axes for smooth motion in all directions. The mount has high-precision worm gear drives and electric slow motion controls in both right ascension and declination. Enhanced precision factory alignment of the motor gear assembly assures greatly reduced backlash and tracking smoothness. The dual-axis slewing/tracking motors have nine user-selectable slew and slow-motion speeds: 4.5°, 3°, and 1.5° per second; and 128x, 64x, 16x, 8x, 2x, and 1x the sidereal rate. Automatic sidereal-rate tracking in right ascension keeps objects precisely centered in the field for leisurely observing. Power for the dual-axis drives is supplied by a battery pack that plugs into the control panel. The pack uses eight (user-supplied) D-cell batteries to power the scope for as long as 40 hours, depending on the air temperature (low temperatures reduce the usable battery life). Optional adapters with 25’ cords are available for uninterrupted AC and 12 volt DC rechargeable or car battery operation, as well.
      If serious long exposure astrophotography is in your plans, a supplied illuminated polar viewfinder and micrometric altitude and azimuth controls allow quick, precise polar alignment. A periodic error correction circuit in the computer control lets you train the mount to correct the small right ascension drive errors inherent in all telescope drive systems. This minimizes the number of guiding corrections needed during long exposure astrophotography. A high precision pointing subroutine in the computer lets you point accurately at objects for photography that are too dim to be seen though the scope.
      The mount’s sliding counterweight is locked in place with a single hand-tighten lever, making it easy to rebalance the scope if you add heavy photographic accessories. The mount is easily capable of handling the scope and any reasonable combination of photographic accessories you might want to use. Snap-on covers keep the motor drives and polar alignment scope free from dust and debris.

• AutoStar computer hand control: The built-in Autostar dual-axis electronic control system has a database of 30,223 objects it can find and track for you. They are accessed using a 20-key alphanumeric keypad hand control on a 24" coiled cord. There are 13,235 non-stellar deep sky objects, including the complete Messier, Caldwell, IC, and NGC catalogs, although not all objects are visible in this size telescope. There are also 16,888 stars sorted by name, SAO catalog number, and whether they are double or variable stars. You also get the 8 major planets; the Moon; 26 asteroids; 15 comets, and 50 Earth satellites. In addition, there are 200 memory locations available for storing your own user-defined objects, such as the coordinates of asteroids and new comets that are printed regularly in Astronomy and Sky & Telescope magazines. In addition to the 30,223 objects in its database, the Autostar can automatically move the scope to any object with known right ascension and declination coordinates.
      The Autostar hand control gives you a digital readout of r. a. and dec coordinates; scrolling information about the object being viewed; plus the results of calculations about sunrise, sunset, moonrise, moonset, moon phases, solar eclipses, lunar eclipses, the minimum of Algol, and more. Hypertext links on the Autostar screen display define many of the terms used in the computer (there's more than one megabyte of compressed text stored in the Autostar.) Built-in guided tours of the sky are tailored to the day of the year you are observing. They direct you to showpiece objects, including the Moon and any planets then visible. Most of the tour objects are accompanied by descriptions scrolling across the Autostar display (the description of Algol, for example, is over 300 words long). The Moon has different descriptions based on its phase, and prominent features near the terminator are highlighted.
      All of the database and scope operation information is displayed on a two line, 16-character, LED display on the hand control. A numeric keypad on the hand control gives complete control over the many, many Autostar functions and convenience features. On-screen operation instructions guide you through setup and use of the Autostar and a help function is only a keystroke away.
      The computer uses a three-star alignment method to precisely align the scope’s optical and mechanical systems on the heavens. Alignment is easily accomplished in only a few short minutes with the aid of the built-in polar alignment scope. You can be observing in as little as 15 minutes after you first take the scope outdoors.

• Adjustable height tripod: The tripod has tubular chromed steel legs. Each leg has two anodized aluminum leg extension locks with an internal brake to eliminate accidental slippage of the internal extending leg section. These locks face inwards to prevent snagging on your clothing or gouging your shin as often happens if you run into a conventional outward-facing leg lock in the dark. A center leg brace adds rigidity and excellent damping characteristics. A set of optional #895 vibration suppression pads under the tripod feet will even further improve telescope damping time for steadier high power observing. The center leg brace is drilled to form a convenient accessory tray that holds three 1.25" eyepieces to keep them up out of the dew-soaked grass.

• Dovetail slide bar: An adjustable dovetail slide bar and dual tube mounting rings allow the optical tube to be quickly and precisely balanced fore and aft on the mount, eliminating the need for an extra counterweight to balance a camera or other accessories. Setup and takedown times are exceptionally fast, as a single large hand-tighten knob holds the optical tube in place. A second lock knob prevents the tube from sliding off the mount should the hand-tighten knob loosen.

What can you see through this scope:

    While the fast focal ratio of the scope is designed to produce brilliant wide-field images of the faint fuzzies outside the solar system, high-power lunar and planetary images are not slighted. Using optional eyepieces and/or a Barlow to boost the magnification, you can see subtle solar system details that are often lost in telescopes of lesser optical resolution. You can study craters, hairline rilles, mountain ranges, and low contrast lunar ray detail at high magnification as you range over the surface of the Moon using the electronic controller’s pushbutton slow-motion controls. With reasonable seeing conditions, structural detail in Jupiter’s cloud belts and the Great Red Spot (actually closer in color to the Faint Pink Spot at this point in time) are visible, as are dusky markings on the face of Saturn and Cassini’s division in Saturn’s brilliant rings.
    The 6" aperture of the scope is large enough to reveal many faint deep space objects in striking detail. At the same time, it is not so large as to be overwhelmed by light pollution at a suburban observing site, as can easily happen to larger aperture telescopes.
    Optically very nice, and very reasonable in cost, the fully-computerized 6" LXD75 N-6AT Newtonian reflector has enough aperture and resolution to keep you busy observing for the rest of your life – without being so big and clumsy that it becomes a chore to take outside. It can be your passport to virtually the entire Universe, a passport you’ll be tempted to use every night the skies are clear. It is a scope that can keep you happily observing for years to come for little more than the cost of a cup of coffee a day.