J009 Dual Speed Focusing Seat with Teeth Fixed for Telescope

Key Benefits

• Dual speed focusing with 1:10 fine adjustment allows precise focus control for planetary and deep-sky observations
• 90mm focusing stroke provides ample travel for eyepieces of varying focal lengths and telescope configurations
• 2" eyepiece interface with 1.25" conversion enables use with both standard and compact eyepieces
• M96.5x1 host interface ensures compatibility with Newtonian telescope optical tubes
• All-metal construction resists flex and maintains alignment under repeated use

Application Scenarios

• Adjusting focus on a Newtonian telescope during planetary observation with fine control over small focus shifts
• Switching between wide-field and high-power eyepieces without changing the focuser setup
• Mounting on a telescope that requires a rigid, non-flexing focuser for long-exposure astrophotography
• Using a 1.25" eyepiece in a 2" focuser by converting the interface without losing focus precision
• Setting up a telescope for amateur astronomy clubs where consistent focus performance is required

Who It Is For

• Amateur astronomers using Newtonian telescopes for visual observation
• Astrophotography enthusiasts requiring stable, repeatable focus adjustment
• Astronomy clubs and educational institutions setting up shared telescope systems
• Telescope assemblers and repair technicians replacing or upgrading focuser components
• Users of 2" eyepiece systems who need a reliable, all-metal focuser with fine adjustment

Problems It Solves

• A focuser with no fine adjustment makes it difficult to achieve sharp focus on planets or small deep-sky objects
• Flexible or plastic focusers can shift during use, causing focus drift during long observations
• Lack of 1.25" compatibility in a 2" focuser limits eyepiece choice and increases setup time
• Short focusing stroke prevents use with long focal length eyepieces or when using a Barlow lens
• Inconsistent interface size between telescope tube and focuser leads to misalignment or loose fit

Technical Features

• Dual speed focusing mechanism with 1:10 fine adjustment for precise control
• Focusing stroke of 0-90mm for extended focus range across different eyepiece types
• 2" eyepiece interface with 1.25" conversion capability using included adapter
• Host interface M96.5x1 for secure mounting on Newtonian telescope optical tubes
• All-metal construction for durability and resistance to thermal expansion and mechanical stress

Specifications

Specifications are taken from the AMADA product data for this item. Confirm critical dimensions with us in writing before ordering.

Customization Options

• Available with or without 1.25" conversion adapter, depending on order specification
• Can be supplied with a different interface if required, provided the host thread is known
• Surface finish or coating can be specified upon request for corrosion resistance

Comparison With Other Options

Use Guide

• Ensure the M96.5x1 thread on the telescope tube is clean and free of debris before mounting
• Tighten the focuser securely to prevent wobble during use, but avoid over-tightening
• Use the coarse adjustment to move quickly through the focus range, then switch to fine adjustment for final focus
• When using a 1.25" eyepiece, insert the adapter fully and ensure it is seated correctly
• Check for smooth operation after installation; if resistance is felt, inspect for misalignment or debris