• ES-ED127075-04
  • ES-ED127075-04
  • ES-ED127075-04
  • ES-ED127075-04
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Explore Scientific

Explore Scientific 127mm f/7.5 ED Triplet Apochromat Refractor — High-Performance APO OTA for Astrophotography and Visual Use

Explore Scientific 127mm f/7.5 ED Triplet Apochromat Refractor — High-Performance APO OTA for Astrophotography and Visual Use

$2,159.99
$2,159.99
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If colour fringing in standard achromat refractors frustrates you, the Explore Scientific 127mm f/7.5 ED triplet apochromat is the upgrade that fixes it — a three-element air-spaced objective using ED (extra-low dispersion) glass to virtually eliminate chromatic aberration. The result is razor-sharp stars, punchy contrast on planets and the Moon, and clean colour rendition on nebulae that makes both visual observing and astrophotography more rewarding.

At 952mm focal length, this scope sits in a sweet spot: enough reach for planetary detail and galaxy structure, while still fitting most popular mounts. The 2.5" hexagonal rack-and-pinion focuser handles heavy imaging gear without flexing, and the retractable dew shield keeps stray light out while shortening the tube for transport.

What you'll see:

  • Planets — Jupiter's cloud belts sharp and colour-accurate; Saturn's Cassini Division cleanly split
  • The Moon — ultra-sharp detail with no colour halo around bright limb edges
  • Globular clusters — resolved to the core, stars pinpoint right across the field
  • Emission nebulae — glowing gas colours true with no false-colour contamination
  • Galaxies — core, disc, and brighter dust lane structure visible under dark skies

What's in the box:

  • 127mm ED triplet APO optical tube — apochromatic objective with retractable dew shield
  • 2.5" hexagonal rack-and-pinion focuser — large, rigid focuser suited to cameras and heavy eyepieces
  • 2" dielectric diagonal — high-reflectivity angled viewer for comfortable eyepiece position
  • 8×50 straight-through illuminated finder scope — finds targets with an illuminated crosshair
  • Tube rings and Vixen-style dovetail — attaches to your equatorial or alt-az mount

Beginner note: APO means apochromat — a lens design that brings multiple wavelengths of light to the same focus point, eliminating the colour fringing (purple halos around bright objects) you get in cheaper achromat refractors. You'll notice the difference on the first night, especially on the Moon and bright planets.

Specs:

Aperture 127mm — 5 inches of ED glass for sharp, colour-corrected views
Focal Length 952mm — versatile for both planetary and deep-sky use
Focal Ratio f/7.5 — excellent for visual and imaging work
Optical Design Air-spaced ED triplet APO — three elements, near-perfect colour correction
Lens Coatings Fully multi-coated — maximum light throughput and contrast
Focuser 2.5" hexagonal rack-and-pinion — solid under heavy imaging loads
Diagonal 2" dielectric — high-reflectivity, included
Finder 8×50 illuminated straight-through finder
Dew Shield Retractable — reduces tube length and keeps optics clear
Mount Interface Tube rings + Vixen-style dovetail
OTA Weight ~7.1 kg

Step up to true apochromatic colour correction — the ES-ED127075-04 is the refractor that serious visual observers and astrophotographers keep for life.

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Frequently Asked Questions

With a beginner telescope you can see a surprising amount — the craters and mountains on the Moon, the rings of Saturn, the moons of Jupiter, and star clusters like the Pleiades. As you get more comfortable, you can also spot nebulae and distant galaxies. Not sure which beginner telescope is right for you? Check out our Telescope Buying Guide.
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All telescopes on Telescope Wolves are hand-picked with beginners in mind. If you're unsure which telescope is right for you, check out our Telescope Buying Guide.
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