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Trending ED102 refractor series

Compare Explore Scientific's popular 4-inch air-spaced triplet refractors

Explore Scientific ED102 Essential Series Air-Spaced Triplet APO Refractor Telescope - ES-ED10207-02 812257014958
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Explore Scientific ED102-FCD100 Series Air-Spaced Triplet Refractor Telescope - FCD100-10207-02 811803034389
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Explore Scientific ED102-FCD100 Series Air-Spaced Triplet Telescope in Carbon Fiber - FCD100–10207-CF-01 811803034402
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Price
Price
$1,199.99
$1,999.99
$2,499.99
Aperture
Aperture
102 mm | 4"
102 mm | 4"
102 mm | 4"
Focal Length
Focal Length
714 mm
714 mm
714 mm
Focal Ratio
Focal Ratio
f/7
f/7
f/7
Optics
Optics

1.14 arcsec resolution

12.5 limiting magnitude

HOYA FCD1 extra-low dispersion (ED) glass

EMD enhanced multi-layer coatings

1.14 arcsec resolution

12.5 limiting magnitude

HOYA FCD100 extra-low dispersion (ED) glass

EMD enhanced multi-layer coatings

1.14 arcsec resolution

12.5 limiting magnitude

HOYA FCD100 extra-low dispersion (ED) glass

EMD enhanced multi-layer coatings

Weight
Weight
12 lb | 5.4 kg
10.9 lb | 4.94 kg
9.5 lb | 4.3 kg

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Most aperture per dollar

Dobsonians have long been the preferred choice of beginner & serious visual astronomers due to their large aperture, excellent light-gathering ability, and low cost.

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Unistellar eVscope 2

The eVscopes are the world’s most powerful and simple-to-operate smart telescopes, which allow them to bring the wonders of the universe to life in seconds—even in light-polluted urban settings.

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Unistellar eVscope eQuinox Smart Telescope - EQUINOX 3701393200073
Unistellar eQuinox Digital Reflector Telescope and Backpack Bundle
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Unistellar eVscope eQuinox 2 Smart Telescope - EQUINOX2 3701393200233
Unistellar eQuinox 2 - Smart Telescope for light polluted cities
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Unistellar eVscope 2 - Smart Digital Telescope 3701393200226
Unistellar eVscope 2 114mm f/4 GoTo Reflector Telescope
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Price
Price
$1,999.00 $2,299.00
$2,499.00
$4,899.00
Field of View
Field of View

27 arcmin x 37 arcmin

34 arcmin x 47 arcmin

34 arcmin x 47 arcmin

Optics
Optics

4.9 Mpx image resolution

6.2 Mpx image resolution

7.7 Mpx image resolution

Nikon Eyepiece

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