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Home / Products / Astronomy Focuser / J003 2’’ Single Speed Focusing Seat for
J003 2’’ Single Speed Focusing Seat for Astronomical Telescope

J003 2’’ Single Speed Focusing Seat for Astronomical Telescope

J003 is a 2'' single-speed focusing seat for astronomical telescopes, designed for Newtonian telescope systems. It features a manual focusing mechanism with a 70 mm focusing stroke and a 118MM*95MM host interface. The eyepiece interface is 2'' with 1.25'' compatibility. Constructed entirely from metal, it includes a base plate for stable mounting.

  • Single-speed manual focusing with 70 mm stroke for precise telescope alignment
  • 2'' eyepiece interface with 1.25'' conversion capability for interchangeable eyepieces
  • All-metal construction ensures durability and thermal stability during long exposures
  • Includes base plate for secure mounting on telescope mounts or tripods
  • 118MM*95MM host interface matches standard Newtonian telescope backplates
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Technical features

  • Focusing stroke: 0–70 mm
  • Focusing method: manual
  • Host interface: 118MM × 95MM
  • Eyepiece interface: 2'' (1.25'' convertible)
  • Material: All metal
  • Includes base plate for mounting

Who it is for

  • Amateur astronomers building or upgrading Newtonian telescopes
  • Importers sourcing accessories for telescope kits or complete systems
  • Distributors offering focused accessory packages for telescope assembly

Specifications

ModelJ003
Focusing Stroke0–70 mm
Focusing MethodManual
Host Interface118MM × 95MM
Eyepiece Interface2'' (1.25'' convertible)
MaterialAll metal
Includes Base PlateYes

Use guide

  • Confirm telescope backplate matches 118MM × 95MM host interface before installation
  • Attach base plate to telescope mount using provided mounting holes
  • Insert eyepiece into 2'' socket; use 1.25'' adapter if needed
  • Adjust focus manually using the focusing knob for sharp image alignment

FAQ

What is the focusing stroke?
70 mm, with manual focusing method.
Is the eyepiece interface compatible with 1.25'' eyepieces?
Yes, the 2'' interface includes a 1.25'' adapter for compatibility.
Does it include a base plate?
Yes, the base plate is included for direct mounting.
What material is used?
All metal construction for durability and thermal stability.
What telescope systems is it compatible with?
Designed for Newtonian telescopes with 118MM × 95MM host interface.

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