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Home / Products / Astronomy Accessory / Astronomy Focuser / J001 2” Single Speed Focus Seat for Astr
J001 2” Single Speed Focus Seat for Astronomical Telescope

J001 2” Single Speed Focus Seat for Astronomical Telescope

J001 is a 2-inch single speed focus seat for astronomical telescopes, designed for manual focusing with a 70 mm focusing stroke. It features a metal construction, M94.5×1 host interface, and a 2-inch eyepiece interface compatible with 1.25-inch accessories. Suitable for use in telescope setups requiring stable, precise focus adjustment.

  • All-metal construction ensures durability and thermal stability during long observation sessions
  • 70 mm focusing stroke provides sufficient range for precise focus adjustment across various eyepieces
  • 2-inch eyepiece interface with 1.25-inch compatibility allows use with a wide range of standard accessories
  • M94.5×1 host interface ensures secure mounting on compatible telescope tubes
  • Single speed manual focusing offers smooth, controlled movement without backlash
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Technical features

  • Focusing stroke: 0–70 mm
  • Focusing method: manual single speed
  • Host interface: M94.5×1
  • Eyepiece interface: 2-inch (1.25-inch convertible)
  • Material: all metal
  • Designed for use with standard astronomical telescopes and accessories

Who it is for

  • Amateur astronomers building or upgrading telescope systems
  • Distributors sourcing accessories for telescope kits
  • Educational institutions setting up observational astronomy labs

Specifications

ModelJ001
Focusing Stroke0–70 mm
Focusing MethodManual single speed
Host InterfaceM94.5×1
Eyepiece Interface2-inch (1.25-inch convertible)
MaterialAll metal

Use guide

  • Mount the focus seat onto the telescope tube using the M94.5×1 interface
  • Insert a 2-inch eyepiece; use 1.25-inch adapter if needed
  • Adjust focus manually by rotating the focusing knob until image is sharp
  • Ensure the focus seat is securely tightened to prevent movement during use

FAQ

What is the focusing stroke of the J001?
70 mm, from 0 to 70 mm.
Can I use 1.25-inch eyepieces with this focus seat?
Yes, the 2-inch interface is convertible to 1.25-inch using an adapter.
What is the host interface size?
M94.5×1 thread, standard for many telescope tubes.
Is the focus seat made of metal?
Yes, it is constructed entirely from metal for durability.
Is this focus seat compatible with all telescopes?
It fits telescopes with M94.5×1 threaded mounting, not all models.

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