Explore Scientific FirstLight 127mm f/9.4 Achromatic GoTo Refractor with EXOS-2GT Mount

BH #EXFLAR127T • MFR #FL-AR1271200EXOS2GT
Explore Scientific
Explore Scientific FirstLight 127mm f/9.4 Achromatic GoTo Refractor with EXOS-2GT Mount
Key Features
  • 127mm Achromatic Refractor OTA
  • 1200mm Focal Length, f/9.4 Focal Ratio
  • Fully Multi-Coated Optics
  • 1.25" 25mm Eyepiece, 2" 90° Diagonal
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Explore Scientific put their FirstLight 127mm f/9.4 Achromatic GoTo Refractor with EXOS-2GT Mount includes a tripod and observing accessories to provide users with a complete observational package ideal for exploring the Moon and planets within our solar system, with the capability to reach out to bright deep-sky subjects such as star clusters, galaxies, and nebulae. The refractor-style optical tube has a large 127mm (5") aperture configured with an achromatic lens system to correct chromatic and spherical aberration which translates to crisp and clear images with true color rendition with little distortion at the edges. Complementing this optical configuration, are fully multi-coated optics that increase light transmission to allow users to see distant objects better and increase details of objects within the solar system.
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Explore Scientific FirstLight Overview

  • 1Description
  • 2Optical Tube
  • 3StarTracker GoTo System
  • 4Mount
  • 5Tripod
  • 6Included Accessories

Explore Scientific put their FirstLight 127mm f/9.4 Achromatic GoTo Refractor with EXOS-2GT Mount includes a tripod and observing accessories to provide users with a complete observational package ideal for exploring the Moon and planets within our solar system, with the capability to reach out to bright deep-sky subjects such as star clusters, galaxies, and nebulae. The refractor-style optical tube has a large 127mm (5") aperture configured with an achromatic lens system to correct chromatic and spherical aberration which translates to crisp and clear images with true color rendition with little distortion at the edges. Complementing this optical configuration, are fully multi-coated optics that increase light transmission to allow users to see distant objects better and increase details of objects within the solar system.

The SkyTracker kit includes the hand controller unit, and right ascension and declination motors. Its hand controller has a database of more than 272,000 objects with the ability for users to input custom coordinates and favorites. With a slew speed of 2°/second and nine tracking speeds the SkyTracker can accurately keep near and deep sky objects such as the Moon, planets, galaxies, and nebulae centered in your eyepiece for long exposure imaging and astrophotography or prolonged observation sessions.

The tripod is built with large 2" diameter stainless steel legs and tight tolerances to reduce vibration for clearer viewing. A center stabilizer bar pulls the accessory tray up to lock the legs in place adding further rigidity and vibration reduction. It is adjustable from 26.8 to 42.5" to accommodate a wide range of users and features large thumbscrews for tool-free adjustment in the field. An adjustable tray is also included with the tripod to keep eyepieces, flashlights, and other accessories safe and at the ready. Rounding out the included accessories is a 25mm eyepiece, a 90° star diagonal for comfortable viewing, a universal smartphone holder for capturing images through the eyepiece, and an unmagnified red-dot finder.

Optical Tube

  • 127mm aperture
  • f/9.4 focal ratio
  • 1200mm focal length
  • Achromatic refractor optical design
  • Fully multi-coated optics improve light transmission, color, and contrast
  • Achromatic lens configuration reduces spherical and chromatic aberration for true color rendition with edge-to-edge clarity
  • 2.5" hexagonal rack-and-pinion focuser allows for precise focusing with the ability to carry heavier imaging rigs without flexing; up to 10-pound (4.5kg) payload capacity
  • 2" eyepiece holder allows the use of larger eyepieces and accessories; when imaging, the larger drawtube enables complete coverage of larger camera sensors to avoid vignetting

StarTracker GoTo System

  • Dual-axis DC servo motors with digital encoders
  • Database includes over 272,000 astronomical objects
  • Add user-defined objects and favorites
  • Controls dual axis motors for precision tracking
  • Slewing speed: 2° per second, maximum
  • Nine tracking rates for near and deep-sky objects
  • 2.5x1.4" (6.3x3.6cm) LCD screen, eight-rows with 21 digits per row

Mount

  • 28-pound payload capacity
  • Cast aluminum with white powder-coat
  • Ball bearings on both axes reduce vibrations and minimize backlash
  • 9.9lb (4.5kg) counterweight with 20mm diameter bar
  • Latitude, Right Ascension, and Declination scales
  • Right ascension axis release lever allows for fast manual adjustment
  • Integrated bubble level on mount base
  • Runs on eight user-supplied D-cell batteries

Tripod

  • Three-section adjustable-height
  • 2" stainless steel legs
  • 26.8 to 42.5" height adjustment range
  • Center stabilizer bar locks legs in place to reduce vibrations
  • Accessory tray with holes for 1.25" eyepieces
  • Spiked feet for use in ground and grass for increased stability, especially on rough or uneven area

Included Accessories

  • 1.25" 25mm Plössl eyepiece yields 48x magnification
  • 2" 90° star diagonal places head in comfortable position, especially when OTA is aimed at or near the zenith
  • 1.25" reducer adapter enables the use of smaller eyepieces and accessories
  • Smartphone adapter attaches over eyepiece and allows any smartphone to be used for astrophotography
  • Red-dot finder: Unmagnified for fast subject acquisition with variable red illumination to protect night-adjusted vision

Explore Scientific FirstLight Specs

Optical DesignAchromatic refractor
Aperture127mm
Focal Length1200mm
Focal Ratiof/9.4
Eyepiece Barrel Diameter2", or 1.25" with included adapters
Diagonal90° star diagonal
2" snout and eyepiece holder
FinderscopeRed-dot finder
TripodSteel adjustable-height
2.0" / 5.1 cm diameter legs
Height, min: 26.8" / 68.1 cm
Height, max: 42.5" / 108.0 cm
Mount TypeGerman equatorial
Power Source8 x D-cell batteries
Optical Tube DimensionsNot specified by manufacturer
WeightNot specified by manufacturer
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