The NexStar Evolution 8 203mm Schmidt-Cassegrain Telescope from Celestron is a powerful, portable, versatile, and user-friendly telescope that can be used for observing everything from the Moon and planets to deep-sky objects like galaxies and nebulae. Using Celestron's proprietary StarBright XLT multi-coating system, light transmission is increased throughout the entire optical path with anti-reflection multi-coated lenses, highly reflective multi-coated mirrors, and four-element rare-earth glass. While the focal ratio is a slow f/10, the scope's precision tracking system allows it to be a competent astrophotography/astroimaging platform for the Moon and planets. Optical Performance 203mm (8") aperture f/10 focal ratio 2032mm focal length Crown optical glass primary mirror StarBright XLT optical coatings: Multi-layer aluminum/SiO2 (quartz)/TiO2 (titanium dioxide) mirror coatings with flat reflectivity across the light spectrum for both astrophotography/astroimaging and visual observation Multi-layer MgF2 (magnesium fluoride) and HfO2 (hafnium dioxide) anti-reflective lens coatings High-transmission water white glass corrector lens with 97.4% light transmission Internal focusing mechanism Resolution: 0.69 arcsec (Rayleigh); 0.57 arcsec (Dawes) Secondary mirror obstruction: 2.5"; 9.77% by area Fastar capability: Secondary mirror can be removed and a DSLR or imaging rig mounted in its place for fast wide-field astrophotography NexStar Controller 2-line, 16-character LCD display 19 fiber optic backlit red LED buttons Database of over 40,000 celestial objects plus 100 user defined Automatically slew to planets, stars, constellations, and a variety of catalogs Camera control: For piggyback wide field or conventional astrophotography through the OTA, the controller can automatically trigger the shutter release to capture the image Anti-backlash compensation programs-out play between gears for more precise tracking Tour Mode: Shows a selection of the most popular objects for the time and date you are observing Constellation Tour: Allows the user to take a tour of all the best objects within a particular constellation Alignment procedures: SkyAlign, Auto 2-Star, 1-Star, 2-Star, and Solar System SkyAlign alignment: Takes minutes, with minimal effort or experience—point the telescope at three bright objects in the sky, and the telescope does the rest Nine slew speeds: 4°/sec, 2°/sec, 1°/sec, 0.5°/sec, 2x, 4x, 8x,16x, and 32x Sidereal, Solar, and Lunar tracking rates for observing the fast-moving Moon, to slower-moving deep space subjects RS-232 communication port allows for computer control Flash updateable via the Celestron website Database Details: Solar system objects including the Sun, Moon, and planets Named objects Stars: Asterims, variable stars, double stars, named stars Caldwell catalog Messier catalog NGC catalog SAO catalog Constellations Sky Portal App Connect your smart device to the telescope via direct WiFi connection; no router required Align and control the telescope from your device App uses the device's camera and compass to determine location and what is available to see Enjoy the same features as NexStar controller, but without wires Expanded database to over 120,000 objects Detailed information on over 200 popular objects including audio commentary, statistics, history, mythology, video, and pictures Database includes: Sun, Moon, planets, star clusters, nebulae, galaxies, asteroids and comets, satellites, and the International Space Station Simulate the night sky up to 100 years in the past or future to plan an upcoming observing session Compass Mode: Hold device up to the night sky and identify objects such as stars, planets, and galaxies; zoom in to view fainter objects not visible to the naked eye Night Vision Mode: Preserves night-adjusted vision Listen to more than four hours of audio narration to learn the history, mythology, and science of astronomy and the night sky Works as a stand-alone planetarium app Free for Android or iOS mobile devices Apple iOS 7.0 and later, or Android 4.0 and later Mount and Tripod Mount: Motorized single-arm alt-azimuth fork mount Altitude and azimuth clutches to manually point the telescope when it is powered off Brass worm gears with steel ball bearings provide smooth movement with reduced vibration 146mm diameter/180-tooth stainless steel worm wheels Ports: One port for NexStar+ controller; one 5 VDC USB charging port for smartphones and small electronics; three auxiliary ports for optional accessories such as StarSense AutoAlign System Runs on one internal rechargeable 9.6V, 4.5Ah lithium-iron phosphate (LiFePO4) battery Includes power supply with US, EU, UK, and AU plugs Tripod: Stainless steel two-section legs Adjustable height accommodates a variety of users Spikes at the end of the legs provide a sure footing on soft or uneven ground Tray keeps accessories and equipment safe and organized No tools required to set up mount and tripod Included Accessories Eyepieces: 1.25"-diameter barrel accept most filters Anti-reflection multi-coated glass Fold-down rubber eyecups for use with or without eyeglasses 40mm eyepiece produces 51x magnification 13mm eyepiece produces 156x magnification Diagonal: 1.25" snout and eyepiece holder 90° angle places head in a comfortable position when optical tube assembly is pointed at or near the zenith Star mirror diagonal corrects view horizontally, but not vertically Finderscope: Projects a single red dot in line of sight Unmagnified view ensures a wide field of view to make finding objects faster and star-hopping navigation easier CEL12091
