K007 1.25 Inch Double Helical Focuser with M31 to 2" Adapter

Key Benefits

• 10mm focusing stroke with 0.05mm accuracy for precise focus adjustment on guiding or finder scopes
• Full metal construction ensures durability under repeated use and vibration in field setups
• M31 to 2 inch adapter allows integration of M31x0.5 threaded primary mirrors with 2 inch focuser systems
• 1.25 inch barrel with M42x0.75 male thread fits standard guide and finder scopes
• Compact design with 43mm minimum length and 53mm maximum length fits tight instrument housings
• Black finish reduces light reflection in low-light observing conditions

Application Scenarios

• Mounting a guide scope with a 1.25 inch barrel to a telescope with an M31x0.5 threaded primary mirror
• Connecting a 2 inch focuser system to a telescope that uses an M31x0.5 threaded primary mirror
• Adjusting focus on a finder scope with high precision during astrophotography setup
• Replacing a sluggish manual focuser with a double helical mechanism for smoother, more accurate movement
• Using the adapter to convert a primary mirror interface from M31 to 2 inch for compatibility with standard accessories

Who It Is For

• Astronomy hobbyists building or upgrading telescope systems
• Amateur astrophotographers needing precise focus control on guide scopes
• Telescope assemblers integrating components with mismatched thread standards
• Educational institutions teaching optical system integration in astronomy labs
• Field technicians maintaining or repairing telescope mounts with mixed interface types

Problems It Solves

• A sluggish or imprecise focuser on a guide or finder scope limits fine focus adjustment during long-exposure imaging
• Mismatched thread standards between a primary mirror and focuser prevent direct mounting
• Lack of a 1.25 inch to 2 inch adapter forces users to buy a new focuser or modify the telescope
• Low-precision focus mechanisms make it difficult to maintain focus across temperature changes
• Non-metal or plastic focusers wear out quickly under repeated use in outdoor conditions

Technical Features

• Double helical focuser design with high precision and smooth motion
• 1.25 inch barrel with M42x0.75 male thread interface for standard guide and finder scopes
• M31x0.5 male thread interface for primary mirrors on telescopes
• 2 inch female thread with M48x0.75 thread for compatibility with 2 inch focuser systems
• Focusing stroke of 10mm with 0.05mm accuracy
• Minimum length 43mm, maximum length 53mm when fully extended
• Full metal construction for durability and thermal stability
• Black finish to reduce internal light scatter
• Compact and lightweight design with 93g net weight

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 1.25 inch barrel and M31 to 2 inch adapter
• Alternative thread configurations can be provided upon request if compatible with existing standards
• Custom length adjustments possible within 43mm to 53mm range for space-constrained setups

Comparison With Other Options

Use Guide

• Ensure the M31x0.5 male thread on the primary mirror is clean and free of debris before mounting
• Attach the adapter to the primary mirror first, then connect the focuser to the adapter
• Use the double helical mechanism to adjust focus slowly and precisely, especially during imaging
• Check for smooth motion and no binding before use; adjust if resistance is felt
• Store the unit in a dry place to prevent thread corrosion, especially in humid environments