User manual
Celestron NexStar 4SE 102mm f 13

User Manual for Celestron NexStar 4SE 102mm f 13 Maksutov-Cassegrain GoTo Telescope with Observer's Kit

• Product category: Catadioptrics (Cassegrains) Celestron
• Brand: Celestron
• Description and content of package
• Technical information and basic settings
• Frequently asked questions – FAQ
• Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
• Authorized service for Celestron Catadioptrics (Cassegrains)

Product description

• Celestron NexStar 4SE 102mm f/13 Maksutov-Cassegrain GoTo Telescope
  • NexStar SE
  Celestron's NexStar 4SE 125mm f/13 Maksutov-Cassegrain GoTo Telescope is a powerful, versatile, and user-friendly catadioptric-style scope that can be used for observing everything from the Moon and planets to bright deep-sky objects like stars, 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 crown optical glass elements. Similar to their Schmidt cousins, the Maksutov design exchanges the conventional front corrector plate with a convex meniscus lens, which results in a smaller secondary mirror—limiting obstruction and increasing contrast, while eliminating the need for periodic collimation. While the focal ratio is a relatively slow f/13, the scope's optical performance, added to the mount's precision tracking system and integrated equatorial wedge, allows it to be a competent astrophotography/imaging platform for the Moon and planets.Driving the dual servo motors on the mount is the brain of the NexStar 4SE: the iconic NexStar+ computer hand controller. Packed with 40,000+ celestial objects, it can hold up to 100 additional user-defined destinations and is updatable via the Celestron website. It has multiple alignment procedures to get you observing fast—including the super-easy SkyAlign system. Capable of being used in the Northern or Southern Hemispheres, the NexStar has sidereal, lunar, and solar tracking speeds to accurately follow near- and deep-sky objects, plus nine slew speeds and the ability to automatically trigger a camera's shutter release for Fastar or piggyback wide-field photography or conventional prime-focus astrophotography.
  Performance
  • • 4" (102mm) aperture
    • f/13 focal ratio
    • 1325mm focal length
    • Maksutov-Cassegrain optical system
    • Front convex meniscus lens corrects spherical and chromatic aberrations and comas (off-axis aberration) across the entire field of view
    • Smaller secondary mirror versus Schmidt-Cassegrain reduces obstructions and increases contrast
    • BK7 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
    • Resolution: Rayleigh: 1.36 arcsec / Dawes: 1.14 arcsec
    • Secondary mirror obstruction: 1.25", 34.4% by diameter, 11% by area
    • Internal 90° flip mirror: With the mirror flipped up, the 90° angle puts head in a comfortable viewing position when scope is pointed at or near the zenith; lay the mirror down to direct light to the visual back for astrophotography/imaging
  NexStar+ Computer 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 optical tube assembly, 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 you 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
    • Tracking modes: Alt-Az (default, for general GoTo use), EQ North (use for long-exposure astrophotography in Northern Hemisphere with EQ wedge engaged), EQ South (use for long-exposure astrophotography in Southern Hemisphere with EQ wedge engaged), Off (no tracking when using as a terrestrial spotting scope)
    • RS-232 communication port allows for computer control
    • Flash updatable 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
  Mount & Tripod
  • Mount:
    • Single-fork alt-az
    • Dual-axis servo motors allow for precise tracking with virtually no vibration
    • Motor resolution: 0.26 arcsec
    • Optical encoders track mount movement to improve tracking and GoTo accuracy while allowing the mount to maintain alignment when moved manually
    • Communication ports: Autoguider port, Aux port, hand controller
    • Runs on eight user-supplied AA batteries or optional 12 VDC power supply
    Tripod:
    • Stainless steel legs
    • Adjustable height accommodates a variety of observation positions or users
    • Built-in equatorial wedge enables more precise tracking accuracy during long-exposure astrophotography
    • Tray holds accessories such as eyepieces and filters and adds stability and vibration reduction
    • Weight: 10 pounds
  Included Accessories
  • Eyepiece:
    • 1.25" diameter barrel
    • 25mm focal length produces 53x magnification
    • Anti-reflection multi-coated glass improves color rendition and contrast
    • Threaded barrel accepts most 1.25" astronomical filters
    • Fold-down rubber eyecup for use with or without eyeglasses
    StarPointer Finder
    • Projects a single red dot in line of sight
    • Unmagnified to make finding objects faster and easier
    • Used primarily for alignment process
  UPC: 050234110495
• Celestron Observers Accessory Kit (1.25")
  • NexStar SE
  Celestron put together this 1.25" Observers Accessory Kit to give users the essentials for observation and astro-imaging. This kit includes two Plossl eyepieces that yield high and low magnifications on any given telescope, two planetary color filters, and a neutral density Moon filter. This kit also includes a multi-function accessory that combines a 2x Barlow lens with a T-adapter which will not only double the magnification of any eyepiece used in it, but also allows a camera-specific T-ring to easily thread onto it to for astrophotography with a DSLR. An included plastic carrying case holds all of the kit's optical accessories with room for more.
  Eyepieces
  • • 1.25" barrel diameter
    • Four-element lens design
    • 52° apparent angle of view
    • Anti-reflection fully multi-coated optics improve light transmission, color rendition, and contrast
    • 17mm focal length produces a medium magnification view in most telescopes
    • 6mm focal length produces high magnifications - ideal for the Moon and planets
  Eyepiece Filters
  • #80A Medium-Blue:
    • Enhances the contrast of the cloud belts on Jupiter and the polar ice caps on Saturn
    • Increases contrast on the Moon
    #25 Deep Red:
    • Helps to define the polar ice caps on Mars
    • Useful when observing Jupiter
    ND Moon:
    • Helps block out a portion of the Moon's light to increase contrast, allowing users to see details better
    • Use when observing Venus to reduce glare so that the planet's phases can more easily be seen
  Combo Accessory
  • • 2x Barlow: Doubles the magnification of any 1.25" eyepiece
    • T-threads allow a camera to be mounted when used with an optional T-ring
  UPC: 050234943086

• NexStar 4SE 102mm f/13 Maksutov-Cassegrain GoTo Telescope sbyyybtyuycasfexrdxatabczuzeyfywsr
• E-Lux 25.0mm 1.25" Eyepiece
• StarPointer Finderscope
• NexRemote Control Software CD
• The Sky CD-ROM Software for Windows
• RS-232 to Serial Port Cable - for GPS 16 Accessory
• NexStar+ Hand Controller
• Tripod with Accessory Tray
• Limited 2-Year Warranty

• Observers Accessory Kit (1.25")

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Technical parameters

• Celestron NexStar 4SE 102mm f/13 Maksutov-Cassegrain GoTo Telescope

  Optical Design	Maksutov Reflector
  Aperture	102 mm / 4"
  Focal Length	1325 mm
  Focal Ratio	f/13
  Focuser	Internal
  Eyepiece Barrel Diameter	1.25"
  Diagonal	90 Rating 100% users recommend this product to others. And what about you? This product has already been rated by 14 owners. Add your rating and experience with the product. Discussion Ask our technicians if you have a problem with your settings, or if anything is unclear in the user manual you have downloaded. You can make use of our moderated discussion. The discussion is public and helps other users of our website who may be encountering similar problems. The discussion is empty - enter the first post Post a new topic / query / comment: Items marked with * are required. Your name *: E-mail : Subject *: Message *: Your email address will not be displayed. Do not forget to fill it in if you want to receive a reply to your enquiry/contribution. Processing of personal data in accordance with GDPR