• Explore Scientific 127mm f/7.5 ED Triplet Apochromat Refractor OTA — High-Performance APO for Astrophotography
  • Explore Scientific 127mm f/7.5 ED Triplet Apochromat Refractor OTA — view 2
  • Explore Scientific 127mm f/7.5 ED Triplet Apochromat Refractor OTA — view 3
  • Explore Scientific 127mm f/7.5 ED Triplet Apochromat Refractor OTA — view 4
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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

$1,195.00
$1,499.99 $1,195.00
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The Explore Scientific 127mm f/7.5 ED Triplet Apochromat Refractor is a high-performance five-inch air-spaced triplet apochromatic refractor telescope for serious visual observing and astrophotography. Its genuine HOYA ED glass and air-spaced triplet design deliver pinpoint stars, high contrast, and true color across the field, while the generous 127mm aperture pulls in far more light and detail than smaller apos.

Who it's for

Advanced observers and astrophotographers who want large-aperture apo performance in an optical tube (a sturdy mount is required; sold separately). Planning to image? See our astrophotography for beginners guide.

Key features

  • 127mm f/7.5 air-spaced triplet apo optics with genuine HOYA ED glass
  • Large aperture for bright, high-resolution views of the Moon, planets, and deep-sky objects
  • Dual-speed HEX rack-and-pinion focuser for precise focus under heavy camera gear
  • Built-in retractable dew shield and dovetail for mounting
  • Excellent for high-power visual and wide-field imaging

Specifications

Optical design Air-spaced triplet apochromat
Glass HOYA FCD1 ED
Aperture 127 mm
Focal length 952 mm
Focal ratio f/7.5
Focuser Dual-speed HEX rack-and-pinion
Included Tube rings, dovetail, dew shield (OTA only — no mount)
SKU ES-ED127075-04

Frequently asked questions

What mount do I need?
At 127mm this is a substantial tube — use a heavy-duty equatorial mount (EQ5-class or larger) for imaging, and a sturdy alt-az or equatorial for visual.

How is it different from the FCD100 carbon-fiber 127mm?
Both are 127mm f/7.5 triplets; the carbon-fiber version uses premium HOYA FCD100 glass and a lighter carbon tube. This ED version delivers excellent apo performance at a lower price.

Is it good for astrophotography?
Yes — with a matched field flattener it produces sharp, high-resolution images; the large aperture also excels on the Moon and planets.

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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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