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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Explore Scientific FirstLight 102mm Doublet Refractor with Twilight I Mount - Discontinued
Explore Scientific FirstLight 102mm Doublet Refractor with Twilight I Mount - Discontinued

Explore Scientific FirstLight 102mm Doublet Refractor with Twilight I Mount - Discontinued

by Explore Scientific
SKU ES-FL-AR1021000MAZ01
Sold out
$699.99 - $699.99
$699.99
$699.99 - $699.99
$699.99
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  • 102mm (4") Aperture Doublet Refractor
  • 1000mm Focal Length (f/9.8)
  • Twilight I Manual Alt-Azimuth Mount
  • 2.5" Hexagonal Focuser
  • Includes 25mm Plössl Eyepiece, Red Dot Finder, and Smartphone Adapter
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Explore Scientific FirstLight 102mm Doublet Refractor with Twilight I Mount

    The Explore Scientific FirstLight 102mm Doublet Refractor pairs a 102mm achromatic objective with a 1000mm focal length for sharp, high-contrast views at an f/9.8 focal ratio. This complete package includes the stable Twilight I alt-azimuth mount, a 2.5" hexagonal focuser, and a 25mm Plössl eyepiece, providing everything you need to observe the Moon, planets, and brighter deep-sky objects right out of the box.

    102mm f/9.8 Doublet: High-Contrast Planetary and Lunar Views

    The heart of this telescope is its 102mm air-spaced doublet objective lens. The long 1000mm focal length minimizes chromatic aberration, delivering crisp images of high-contrast targets. You'll resolve details like the cloud bands of Jupiter, the rings of Saturn, and countless craters along the Moon's terminator. The fully multi-coated optics ensure maximum light transmission for brighter views of star clusters and nebulae.

    Twilight I Mount: Stable, Grab-and-Go Manual Tracking

    Supporting the optical tube is the robust Twilight I alt-azimuth mount and steel tripod. Its manual slow-motion controls on both axes allow for smooth, precise adjustments as you track objects across the sky. This intuitive up-down, left-right motion makes it easy for beginners to follow targets without the complexity of an equatorial mount, offering a stable, grab-and-go setup for spontaneous observing sessions.

    Complete Kit: From 2.5" Focuser to Smartphone Adapter

    This FirstLight package is designed for immediate use. The heavy-duty 2.5" hexagonal focuser provides a rigid, stable platform for accessories without the flexure common in smaller focusers. The kit includes a 25mm Plössl eyepiece for 40x magnification, a 90° star diagonal for comfortable viewing, a red dot finder for easy aiming, and a smartphone adapter to capture and share your first images of the Moon and planets.

  • What can I see with the Explore Scientific FirstLight 102mm refractor?

    The 102mm aperture gathers enough light to reveal significant detail on solar system objects and bright deep-sky targets. You can expect to see:

    • The Moon: Thousands of craters, mountains, and rilles in sharp detail.
    • Planets: Jupiter's main cloud belts and four Galilean moons, Saturn's rings, the phases of Venus, and Mars' polar ice caps when it's near opposition.
    • Deep Sky: Bright star clusters like the Pleiades (M45) and the Hercules Cluster (M13), the Orion Nebula (M42), and the Andromeda Galaxy (M31) from a dark-sky site.

    Is the Twilight I mount on the FirstLight 102mm good for beginners?

    Yes, it's an excellent choice for beginners. The alt-azimuth design is intuitive, moving up-down and left-right just like a camera tripod. The slow-motion control knobs allow you to make fine adjustments to keep objects centered in the eyepiece, which is much smoother than trying to nudge the telescope by hand.

    How does the FirstLight 102mm perform on deep-sky objects like the Orion Nebula (M42)?

    The FirstLight 102mm provides very pleasing views of M42. The f/9.8 focal ratio darkens the sky background, increasing contrast and making the nebulosity stand out. You will easily see the four main stars of the Trapezium cluster at its core and the wispy "wings" of the nebula stretching outwards.

    Can I do serious astrophotography with the FirstLight 102mm and Twilight I mount?

    This setup is ideal for getting started with basic astrophotography, but it has limitations. The included smartphone adapter lets you take great pictures of the Moon and bright planets. However, the alt-azimuth mount is not suitable for long-exposure deep-sky imaging, which requires an equatorial mount to counteract field rotation.

    What is the benefit of the 2.5" hexagonal focuser on the FirstLight 102mm?

    The 2.5" hexagonal focuser is significantly more rigid than standard 2" or 1.25" rack-and-pinion focusers found on many entry-level telescopes. This design prevents the focuser tube from sagging or flexing under the weight of heavier eyepieces or a camera, ensuring that the optical alignment remains precise for sharper images.

    How does the FirstLight 102mm refractor compare to a 114mm Newtonian for viewing Jupiter?

    While a 114mm Newtonian has a slight edge in light-gathering, the FirstLight 102mm refractor will often provide higher-contrast views of planets like Jupiter. Refractors do not have a central obstruction (the secondary mirror in a Newtonian), which can slightly degrade image contrast. This means the cloud belts and Great Red Spot may appear sharper and more defined in the refractor.

  • GTIN 812257018116
  • Explore Scientific Warranty