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Explore Scientific

Explore Scientific 102mm f/6.5 Achromat Refractor — Versatile Entry-Level OTA for Planetary and Wide-Field Viewing

Explore Scientific 102mm f/6.5 Achromat Refractor — Versatile Entry-Level OTA for Planetary and Wide-Field Viewing

$499.99
$499.99
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Shipping calculated at checkout.

A versatile 102mm grab-and-go refractor that's genuinely ready to mount out of the box — diagonal, finderscope, and Vixen dovetail all included. The Explore Scientific 102mm f/6.5 Achromat is a solid performer for visual astronomy and a capable entry point into wide-field astrophotography, without the premium price of an apochromat.

The 102mm aperture and f/6.5 focal ratio give you wide, bright fields for sweeping deep-sky objects while still having enough focal length to show planetary detail. The 2" dual-speed Crayford focuser is a meaningful step up from basic rack-and-pinion focusers — precise, slip-free, and comfortable to use at any magnification.

What you'll see:

  • The Moon — craters, rilles, and mountain ranges in excellent detail
  • Saturn's rings and Cassini Division, with 4–5 moons visible under good conditions
  • Jupiter's cloud bands, festoons, and the four Galilean moons
  • Open clusters in wide, bright views; globular clusters resolving at the edges
  • The Orion Nebula and other bright deep-sky objects with visible nebulosity
  • Wide-field star fields — this focal ratio excels at sweeping the Milky Way

What's in the box:

  • 102mm f/6.5 achromat refractor OTA — air-spaced doublet with fully coated optics
  • 2" dual-speed Crayford focuser — smooth, precise focus with coarse and fine adjustment
  • 2" dielectric diagonal with 1.25" adapter — high-reflectivity mirror for bright, accurate color
  • 8×50 finderscope — magnified finder for accurate target acquisition
  • Vixen-style dovetail with cradle rings — fits most standard equatorial and alt-az mounts

Note: No eyepiece included — this is an OTA (optical tube assembly). You'll need at least one 1.25" or 2" eyepiece to observe.

Specs:

Aperture 102mm — capable of splitting close double stars and resolving planetary detail
Focal Length 663mm
Focal Ratio f/6.5 — wide enough for bright deep-sky fields, long enough for planets
Optical Design Air-spaced achromatic doublet — two-element lens, good color correction for visual use
Focuser 2" dual-speed Crayford — coarse and fine adjustment, no slipping
Finderscope 8×50 straight-through — magnified finder for accurate centering
Mount Interface Vixen-style dovetail + cradle rings — fits most standard mounts
OTA Weight ~5.2 kg

A well-equipped, genuinely versatile refractor OTA — great for visual astronomy and a strong starting point for astrophotography.

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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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