J001 2" Single Speed Focus Seat for Astronomical Telescope

Key Benefits

• 70mm focusing stroke allows deep focus adjustment for eyepieces with varying focal lengths
• 2-inch eyepiece interface with 1.25-inch conversion capability increases compatibility with existing accessories
• Fixed M94.5x1 thread ensures secure mounting on standard telescope tubes
• All-metal build resists flex and maintains alignment under repeated use
• Manual focusing method provides precise control without electronic components or power requirements

Application Scenarios

• Adjusting focus on a refractor telescope with a 2-inch eyepiece for planetary or lunar observation
• Using a 1.25-inch eyepiece in a 2-inch focuser via adapter for wider field of view access
• Mounting on a telescope tube where a fixed, non-rotating focuser is required for stability
• Replacing a worn or damaged focuser on a telescope without upgrading to a dual-speed or motorized system
• Setting up a portable telescope for visual astronomy with minimal moving parts and high reliability

Who It Is For

• Amateur astronomers using refractor or compound telescopes for visual observation
• Educational institutions running astronomy programs with fixed telescope setups
• Telescope maintenance technicians replacing or upgrading focuser components
• DIY telescope builders assembling custom optical systems with standard interfaces
• Observatory operators needing a durable, non-electric focuser for long-duration sessions

Problems It Solves

• A fixed focuser with no adjustment capability prevents focus tuning across different eyepieces
• A focuser with a small stroke limits the range of usable eyepieces and focal lengths
• Plastic or low-grade metal focusers flex under weight, causing image drift during observation
• Mismatched thread sizes between focuser and telescope tube require custom adapters
• Motorized focusers add complexity and power needs that are unnecessary for visual use

Technical Features

• Manual focusing method with single-speed adjustment
• Focusing stroke of 0-70mm for full range of focus control
• M94.5x1 thread for mounting on telescope tube
• 2-inch eyepiece interface with 1.25-inch adapter compatibility
• Fixed design with no rotating or moving parts beyond the focusing knob
• All-metal construction for mechanical stability and long-term use

Specifications

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

Customization Options

• Available in standard configuration only; no options for different thread sizes, stroke lengths, or materials
• No mention of custom finishes, engraving, or alternate interface options

Comparison With Other Options

Use Guide

• Ensure the M94.5x1 thread on the telescope tube matches the focuser's mounting thread before installation
• Use the 1.25-inch adapter only when using a 1.25-inch eyepiece; remove it for 2-inch eyepieces
• Turn the focusing knob slowly to avoid overshooting focus, especially at the extremes of the 70mm stroke
• Check alignment after mounting; the focuser should sit flush and not wobble on the tube
• Clean the focusing threads periodically to prevent grit from affecting smooth operation