• Explore Scientific 2" AR Series Dual-Speed Focuser
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Explore Scientific

Explore Scientific 2-Inch AR Series Dual-Speed Crayford Focuser — Smooth Precise Focuser for Achromatic Refractors

Explore Scientific 2-Inch AR Series Dual-Speed Crayford Focuser — Smooth Precise Focuser for Achromatic Refractors

$199.99
$199.99
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Upgrade your refractor with the Explore Scientific 2-inch AR Series dual-speed Crayford telescope focuser. A smooth, precise focuser makes the difference between a fuzzy view and a crisp, pinpoint one — and this heavy-duty Crayford unit gives you both coarse and fine control for confident, repeatable focusing.

A Crayford focuser uses a friction drive instead of gears, so motion is smooth with no backlash. The dual-speed design adds a 10:1 fine-focus knob for the tiny, precise adjustments that high magnification and astrophotography demand.

Who it's for

Ideal for owners of Explore Scientific AR Series achromatic refractors who need a replacement or upgraded focuser, and for anyone wanting finer focus control for visual observing or imaging. New to the hobby? See our guide on how to pick your first telescope.

Key features

  • Dual-speed 10:1 fine focus alongside a coarse knob for both fast and micro-precise adjustments.
  • Smooth Crayford design with no gears, giving backlash-free motion.
  • 2-inch drawtube with 1.25-inch adapter so you can use both eyepiece sizes and barreled accessories.
  • Three-screw compression ring holds eyepieces and cameras securely without marring the barrel.
  • Adjustable drawtube tension to balance heavier eyepieces or camera gear.
  • Large knurled knobs that are easy to grip in the cold or with gloves.
Specifications
Brand Explore Scientific
Model FOCDAR-00
Type Dual-speed Crayford focuser
Focus ratio 10:1 fine focus plus coarse
Fitting 2-inch with 1.25-inch compression adapter
Designed for Explore Scientific AR Series achromatic refractors

Frequently asked questions

What does dual-speed mean?
It combines a standard coarse focus knob with a 10:1 reduction knob, so one turn of the fine knob moves the drawtube a fraction of the coarse knob — perfect for precise, high-power focus.

Which telescopes does it fit?
It's designed for Explore Scientific AR Series achromatic refractors as a replacement or upgrade. Check your telescope's focuser mounting before ordering.

Can I use it for astrophotography?
Yes. The adjustable tension and fine 10:1 focus make it well suited to holding and precisely focusing cameras.

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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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