J003 2'' Single Speed Focusing Seat for Astronomical Telescope

Key Benefits

• 70mm focusing stroke allows full focus adjustment across a wide range of eyepieces and accessories
• 2'' eyepiece interface with 1.25'' conversion enables use of standard and compact eyepieces
• All-metal construction provides rigidity and long-term stability under variable temperature and load
• Base plate included for secure mounting to the telescope tube or optical rail
• Manual focusing method ensures precise control without electronic interference or power requirements

Application Scenarios

• Adjusting focus during planetary or lunar observation with a range of eyepieces
• Mounting on a Newtonian telescope for visual astronomy in a backyard or observatory setup
• Using with a camera adapter to achieve focus on a CCD or DSLR sensor without image shift
• Securing a heavy eyepiece or filter wheel with a rigid metal mount that resists flexing
• Replacing a worn or loose focusing mechanism on an older Newtonian telescope

Who It Is For

• Amateur astronomers using Newtonian reflector telescopes
• Educational institutions teaching observational astronomy
• Telescope builders and retrofitting technicians
• Users upgrading focusing systems for better stability and precision
• Hobbyists performing astrophotography with Newtonian telescopes

Problems It Solves

• A focusing seat with limited stroke forces users to reposition the eyepiece or use spacers
• Plastic or low-stiffness mounts flex under load, causing focus drift during long exposures
• Lack of a base plate makes alignment and mounting difficult on non-standard telescope tubes
• Incompatible interfaces prevent direct use of 2'' or 1.25'' eyepieces without adapters
• No manual focusing option in electronic-only focusers leads to dependency on power and software

Technical Features

• Manual focusing method with single-speed adjustment
• Focusing stroke of 0 to 70mm for full focus range
• 2'' eyepiece interface with 1.25'' conversion capability
• Host interface size of 118MM*95MM for compatibility with standard Newtonian tubes
• All-metal construction ensures durability and resistance to thermal expansion
• Base plate included for secure mounting and alignment
• No electronics or power required - fully mechanical operation

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 with base plate
• No mention of custom interface sizes or material grades
• No option for dual-speed or geared focusing in the provided facts

Comparison With Other Options

Use Guide

• Ensure the host interface (118MM*95MM) matches the telescope tube or rail before mounting
• Attach the base plate securely to the telescope tube using the provided fasteners
• Insert the eyepiece into the 2'' socket and adjust focus manually across the full 70mm stroke
• Use the 1.25'' adapter when using smaller eyepieces to maintain alignment
• Check for smooth motion during focusing; if resistance occurs, inspect for misalignment or debris