Explore Scientific 2″ AR Series Dual-Speed Focuser (FOCDAR-00) — 2-inch Crayford for Achromatic Telescopes

Explore Scientific

Price: $199.99 USD
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Price: $199.99 USD
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The Explore Scientific 2″ AR Series Dual-Speed Focuser (FOCDAR-00) brings smooth, precise focusing to achromatic refractor telescopes. Designed to accept both 2″ and 1.25″ eyepieces or accessories, it offers a dual-speed drawtube motion: a coarse focus knob for quick adjustments and a 10:1 micro-focus knob for fine, razor-sharp focusing — ideal for high-magnification viewing or astrophotography. Its robust build, smooth Crayford mechanism, and tension-adjustable drawtube make it a dependable upgrade or replacement focuser for serious stargazers.

Features

  • Dual-speed Crayford focuser for smooth, backlash-free motion

  • 10:1 micro-focus knob plus coarse focus knob — enables fine adjustment for visual observing or imaging

  • Supports both 2″ and 1.25″ eyepieces/accessories with included 1.25″ compression ring adapter

  • Large, knurled focus knobs — easy to handle, even with gloves or in cold weather

  • Drawtube tension adjustment and lock — ensures stable focus under heavy loads (eyepieces, cameras, diagonals)

  • Durable construction and finish — built for reliable use under field conditions

Specifications

Specification Detail
Model Number FOCDAR-00
Focuser Type Dual-Speed Crayford-style focuser
Drawtube Diameter 2″ (50.8 mm)
Adapter Included 1.25″ compression ring with locking screws
Focuser Length 201 mm
Weight ≈ 1.75 lb (≈ 0.79 kg)
Focus Adjustment 10:1 micro-focus + coarse focus
Compatibility Achromatic refractor telescopes that accept 2″ focusers

What’s Included

  • 1 × 2″ AR Series Dual-Speed Focuser (FOCDAR-00)

  • 1 × 1.25″ compression ring eyepiece adapter with locking screws

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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