1.25 Inch Focuser Off Axis Guider Deluxe Guider for Astronomical Telescope

Key Benefits

• 12.5x12.5mm prism provides a large light-gathering area for stable guiding under low-light conditions
• Aluminium alloy construction ensures rigidity and long-term durability during extended imaging sessions
• 1.25 inch focuser interface allows direct mounting on standard telescope focusers without adapters
• Off-axis guiding maintains the main imaging path uninterrupted, so no secondary exposure is needed for guiding
• Compact design fits within standard telescope tube space and does not interfere with primary optics

Application Scenarios

• Long-exposure astrophotography of galaxies and nebulae where tracking drift must be corrected in real time
• Mounting a guide camera on a telescope without using a separate guide scope or off-axis guider adapter
• Setting up a guiding system for a telescope with limited space for additional accessories
• Using a single camera setup for both imaging and guiding without switching equipment
• Field use at remote observatories where minimal setup and robust components are required

Who It Is For

• Amateur and professional astrophotographers using refractors, reflectors, or compound telescopes
• Telescope users performing deep-sky imaging with CCD or CMOS cameras
• Users with limited space on the telescope tube for guide scopes or separate guiding systems
• Educational astronomy programs requiring reliable, low-cost guiding solutions
• Hobbyists building or upgrading their imaging rigs for better tracking accuracy

Problems It Solves

• A separate guide scope adds weight and alignment complexity to the telescope setup
• Guide cameras mounted on the main imaging train block the optical path and reduce light throughput
• Poor prism size leads to weak guiding signals and unstable tracking during long exposures
• Inadequate materials cause flexure or misalignment under thermal or mechanical stress
• Lack of standard interface forces users to buy custom adapters or modify their focuser

Technical Features

• 12.5x12.5mm prism captures sufficient starlight for reliable guiding in low-light conditions
• 1.25 inch focuser interface compatible with standard telescope focusers
• Aluminium alloy body provides structural rigidity and resistance to thermal expansion
• Integrated prism design allows off-axis guiding without obstructing the main imaging path
• 350g weight ensures minimal impact on telescope balance and tracking performance

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 1.25 inch focuser interface only
• No option for different prism sizes or alternative materials
• No custom engraving or colour coating available

Comparison With Other Options

Use Guide

• Ensure the telescope focuser is clean and free of debris before mounting the guider
• Align the prism so that the guide camera captures a star image from the side of the main field
• Use a guide software (e.g. PHD2) to fine-tune the guide star position and exposure time
• Avoid over-tightening the focuser lock to prevent binding or misalignment
• Check the alignment after long exposures or temperature changes