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

B &H created the Celestron NexStar 4SE 102mm f/13 Maksutov-Cassegrain GoTo Telescope with Observer's Kit to give you all the tools you need to make detailed observations of celestial objects from the Moon and planets to deep-sky wonders. This kit includes the easy-to-manage Maksutov-Cassegrain optical tube assembly (OTA), the iconic NexStar+ GoTo hand controller, a sturdy stainless steel tripod, and a low-power 25mm eyepiece. Adding to this assortment of standard equipment is the Observer's Kit, which gives you two more eyepieces, two planetary filters, a Moon filter, a Barlow lens, a lens cloth, and a hard carrying case for all the Observer accessories plus a few more.

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

  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 �p oint 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")

  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