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This 2" Focuser from Explore Scientific is a dual-speed focuser that comes with the AR series telescopes, and is sold here as a spare part or replacement.
It has two large, knurled 10:1 micro-focusing knobs, and on rough-focus knob. Tension adjustment allows you to lock or adjust the tension on the drawtube when you increase or decrease the weight of your accessories. An included 1.25" compression ring eyepiece adapter, a 2" eyepiece, or a barreled accessory is held in place with three set screws.
In the Box
Explore Scientific Focuser for AR Series Telescopes (2")
1.25" Compression Ring Eyepiece Adapter
Limited 1-Year USA Warranty, Extendable to Transferrable Lifetime Warranty with Registration