• Explore Scientific 2-Inch Rack & Pinion Focuser for Apochromatic Telescopes — Precise, Smooth Focuser for APO Refractors
  • Explore Scientific 2-Inch Rack & Pinion Focuser for Apochromatic Telescopes — view 2
  • Explore Scientific 2-Inch Rack & Pinion Focuser for Apochromatic Telescopes — view 3
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Explore Scientific

Explore Scientific 2-Inch Rack & Pinion Focuser for Apochromatic Telescopes — Precise, Smooth Focuser for APO Refractors

Explore Scientific 2-Inch Rack & Pinion Focuser for Apochromatic Telescopes — Precise, Smooth Focuser for APO Refractors

$299.99
$299.99
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The Explore Scientific 2-inch Rack & Pinion Focuser (FOCEDAPO-RP) is a precision telescope focuser built to give apochromatic refractors smooth, repeatable focus. The focuser is the part of a telescope that moves the eyepiece or camera in and out to sharpen the image, and a good one makes a real difference — especially at high magnification or when imaging, where even a tiny movement matters.

Its dual-speed design pairs a coarse knob for fast changes with a 10:1 fine knob for critical, hair-splitting focus, so you can lock in a sharp view or exposure with ease.

Who it's for

A great upgrade for owners of apochromatic (APO) refractors who want more precise focus for astrophotography or high-power visual observing. If you're building out an imaging setup, our stargazing basics guide covers the fundamentals.

Key features

  • Dual-speed focusing — coarse and 10:1 micro-focus knobs for both fast framing and critical fine focus.
  • 2-inch drawtube — accepts 2" accessories and includes a 1.25" compression-ring adapter for smaller eyepieces.
  • Repeatable positions — an etched measurement scale lets you return to a known focus point session after session.
  • Secure, non-marring grip — compression-ring holder holds eyepieces and cameras firmly without scratching.
  • Built to hold heavy gear — machined metal construction stays stable with heavier imaging trains.

Specifications

Specifications
Model FOCEDAPO-RP
Focuser type Rack & pinion, dual-speed
Drawtube diameter 2" (50.8 mm)
Eyepiece holder 2" with 1.25" compression-ring adapter
Fine focus ratio 10:1
Weight Approx. 0.9 kg (2 lb)
Best for Apochromatic refractors

Frequently asked questions

What does "dual-speed" mean?
It has two focus knobs: a standard coarse knob and a geared 10:1 knob that moves the drawtube much more slowly for precise, fine adjustments.

Will it fit my telescope?
It's designed for Explore Scientific apochromatic refractors. Fit depends on your telescope's back end, so check compatibility with your specific model before ordering.

Can I use 1.25-inch eyepieces?
Yes. A 1.25" compression-ring adapter is included so you can use both 2" and 1.25" accessories.

Is this good for astrophotography?
Yes — the fine focus and secure compression-ring holder are exactly what you want for reaching and holding critical focus with a camera.

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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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