K008 1.25 Inch Double Helical Focuser for Guider Finder Fcope

Key Benefits

• High precision focusing with 0.05mm accuracy for fine adjustments in astronomical imaging
• 10mm focusing stroke allows sufficient range for achieving sharp focus across different optical setups
• Full metal construction ensures durability and resistance to wear during repeated use
• 1.25 inch interface with M42*0.75 male thread enables compatibility with standard guider and finder scopes
• M31x0.5 primary mirror interface supports secure mounting on telescope optical trains
• Black finish reduces light reflection and improves visibility during night-time observations
• Compact design with minimum length of 43mm and maximum length of 53mm fits tight spaces on telescope assemblies

Application Scenarios

• Adjusting focus on a guider scope during long-exposure astrophotography
• Mounting a finder scope on a telescope with a mismatched interface using the 1.25 inch adapter
• Replacing a sluggish focuser on a telephoto lens used for planetary imaging
• Integrating a guide scope into a telescope system where precise focus control is required
• Performing focus calibration in a portable astronomy setup where stability and precision are critical

Who It Is For

• Amateur astronomers conducting astrophotography with DSLR or CCD cameras
• Professional observatories requiring precise focus control on guide and finder scopes
• Telescope builders and integrators assembling custom optical systems
• Field technicians maintaining and upgrading telescope accessories
• Educational institutions teaching observational astronomy and optical alignment

Problems It Solves

• A sluggish or imprecise focuser on a guider or finder scope makes it difficult to achieve sharp focus during imaging
• Mismatched thread sizes between the guide scope and telescope body prevent secure mounting
• Low-precision focusers lead to focus drift and inconsistent results across multiple imaging sessions
• Plastic or low-grade focusers wear out quickly under repeated use in outdoor conditions
• Lack of a reliable 1.25 inch adapter with proper threading limits compatibility with standard accessories

Technical Features

• Double helical focusing mechanism for high precision and smooth motion
• Focusing stroke of 10mm with 0.05mm accuracy per full turn
• 1.25 inch interface with M42*0.75 male thread for compatibility with standard guide scopes
• Primary mirror interface with M31x0.5 male thread for secure attachment to telescope optical trains
• 1.25 inch adapter with M28x0.75 female thread for connecting to scopes with female 1.25 inch barrels
• Full metal construction for long-term durability and resistance to thermal expansion
• Black anodized finish to minimize light scatter and reflections during night use
• Minimum length 43mm, maximum length 53mm, net weight 100g for compact integration

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 the 1.25 inch adapter depending on the user's existing setup
• Can be supplied with alternative thread configurations upon request for specialized applications
• Surface finish can be adjusted for specific environmental conditions if required

Comparison With Other Options

Use Guide

• Ensure the M31x0.5 male thread is securely attached to the telescope's primary mirror interface before use
• Use the 1.25 inch adapter to connect the focuser to a guide or finder scope with a female 1.25 inch barrel
• Turn the focuser knob slowly to achieve fine focus; the 0.05mm accuracy allows for precise adjustments
• Check for smooth motion and absence of binding during the full 10mm focusing stroke
• Avoid over-tightening the threads to prevent damage to the mating components