The LX850 Telescope System with German Equatorial Mount and StarLock from Meade Instruments consists of a 12” f/8 Advanced Coma-Free (ACF) Optical Tube Assembly (OTA), Starlock Dual Imager Full-Time Autoguider, AutoStar II GoTo System, a German Equatorial Mount, and a heavy-duty tripod.
The LX850 Telescope’s OTA features 12” f/8 ACF optics with high-contrast baffling that allows for a wider, flatter field and ensures that pinpoint star images are visible even at the very edge of the field of view. Meade’s UHTC (Ultra-High Transmission Coatings) on the OTA optics reduce light loss through reflection or transmission, and allow for high image brightness and contrast. Thanks to the ACF optics, this telescope ensures reduction in astigmatism and elimination of diffraction spikes. The LX850 telescope comes with the HD-60 25mm Eyepiece that has a large, 60° apparent field of view (AFOV) and a long eye relief for effortless, comfortable observation.
The OTA of the telescope system is held in its place by the precision-machined, heavy-duty German Equatorial Mount. This mount is built using high-quality stainless steel and aircraft grade 6061-T6 aluminum alloy for durability. The mount comes with Meade’s Starlock full-time autoguider that is capable of capturing even a faint 11th magnitude star.
The telescope comes with the Autostar II GoTo system that can command it to automatically slew to any of the 144,000 objects in its library. Other features include a GPS receiver, precision roller bearings on both axes, precision pointing and assisted drift alignment, 5.8" 225-tooth polished bronze worm/gear drives with low periodic error, fine manual adjustment controls on both axes, illuminated reticle output port, and internal cable routing. Two 26 lb counterweights that come with the mount help balance the OTA’s weight. The mount is capable of handling a payload of up to 90 lb.
The whole system is mounted on a steady tripod that features 3” thick legs. The height of the tripod is fully adjustable from 29 to 45".
Note! It is advisable that the 12" OTA is mounted by 2 people due to its large weight and size.
| Telescope | |
|---|---|
| Optical Design | Advanced coma-free |
| Clear Aperture | 12" |
| Focal Length | 2,438 mm |
| Focal Ratio | f/8 |
| Optical Coatings | UHTC |
| Resolving Power | Dawes limit: 0.38 arcseconds |
| Secondary Mirror Obstruction | 16.86% |
| Viewfinder | 8 x 50 mm refractor with cross-hairs |
| Eyepiece | HD-60: 25 mm long eye-relief eyepiece |
| Diagonal | Series 5000, 2.0" (50.8 mm) with enhanced 99% reflectivity |
| Focus System | Internal Crayford-style, zero image-shift primary mirror focus with dual speed and 7:1 control |
| Mounting | OTA: Losmandy-style mounting plate |
| Materials | |
|---|---|
| Optical Tube | Aluminum |
| Weight | 56.0 lb (25.4 kg) |
| Mount | |
|---|---|
| Mount Type | German Equatorial |
| Gear |
Main RA & DEC: 5.80" (14.73 cm) undercut 225 tooth aluminum |
| Gear |
Worm RA & DEC: 0.68" (1.72 cm) diameter precision machined brass |
| Shaft Diameter | Counterweight: 1.75" (4.44 cm) |
| Shaft Length | Counterweight: 12.00" (30.48 cm) long threaded stainless steel |
| Counterweight | 2 x 26.0 lb (11.8 kg) |
| Weight | Counterweight shaft and cap: 12.50 lb (5.66 kg) |
| Tracking Distance Past Meridian | 20° |
| Mounting System | OTA: Losmandy-style dovetail |
| Payload Capacity | 90.0 lb (40.8 kg) |
| Latitude Range | 10 to 70° |
| Tripod | Giant folding adjustable height tripod with 3.00" (7.62 cm) diameter aluminum legs Height from 29.00 to 45.00" (73.66 to 114.30 cm) |
| Control Panel | 12 VDC in, 12 VDC out, Power, Focuser, Reticle, Handbox port, 1 computer connection port (RS232), 1 StarLock port, 1 Aux guide port |
| GoTo System | AutoStar II |
| Onboard Celestial Object Database |
Over 1,44,000 objects Catalogs Included: Index (5,386); NGC (7,840); Partial Caldwell (109); Messier (110); Earth orbiting satellites (26); Planets (9); Uppsala galaxy (12,940); Morphological catalog of galaxies (12,939); General catalog of variable stars (29,364); SAO and Hipparcos star \(42,277); Draper star (21,160); Yale bright star (8,977); Large Bright Quasars Survey (LBQS) (1,055); Named objects (4,313); Herschel (400); Abell catalog of galaxy clusters (2,712); Arp catalog of peculiar galaxies (635); Lunar features (1,754); Asteroids and comets (120); Constellations (88); Solar/Lunar eclipses, Meteor showers (492) |
| Hand Controller | Double line, 16-character LCD; 20 backlit LED buttons |
| Sensors | Home Sensors: Both RA and DEC axes |
| Slew Speed | 3°/second |
| Tracking Rates | 0.01 to 1x, 2x, 8x, 16x, 1/4°, 1/2°, 1°, 3° |
| Tracking Modes | EQ North and South |
| Alignment | Procedure: 2-Star Align, 1 Star Polar Align, StarLock assisted drift align, Easy Alignment and Align on Home |
| Camera | Wide-field: 25 x 26 mm f/1.04 optic with 0.5" format sensor gives field of 14.72 x 11.78° |
| Camera | Narrow-field: 80 x 400 mm f/5 optic with 0.5" format sensor gives field of 57.2 x 45.8 arcminutes (2.68 arcseconds/pixel) |
| High Precision Pointing | ±1 arcminute |
| High Precision Guiding | ±1 arcsecond (with good seeing; 1 to 4 second correction update rate depending on star magnitude; faintest guide star 11th magnitude |
| Power Supply | 12 VDC, 5A using supplied Meade Universal Power Supply |
| Weight | Starlock: 2.9 lb (1.3 kg) |
| Weight | Mount Body: 60.0 lb (27.2 kg) |
| Tripod Weight | 36.0 lb (16.3 kg) |