The SVBONY SV165 Mini 40 mm Guide Scope is a compact, lightweight guiding solution designed for deep-sky astrophotography. With a fast focal ratio and precision mechanical construction, it delivers bright guide stars and reliable tracking performance for long-exposure imaging.

Key Features

• Compact & Lightweight Design
  Ideal for portable and lightweight imaging rigs, minimising additional load on the mount.
• 40 mm Aperture with Fast f/4 Optics
  The 40 mm aperture and fast f/4 focal ratio provide bright guide stars, improving guiding accuracy.
• Fully Multi-Coated Optics
  Multi-coated glass elements enhance light transmission and contrast for reliable star detection.
• Precision Six-Point Adjustment System
  Allows accurate alignment of the guide scope with the main telescope, maintaining consistent guiding.
• Robust Aluminium Construction
  Machined aluminium body offers rigidity and durability while remaining lightweight.

Designed for Astrophotography Guiding

The SV165 is optimised for use with small guide cameras, providing a stable reference star for accurate autoguiding. Its compact size makes it especially suitable for refractors and travel-friendly imaging setups.

Optical & Mechanical Performance

With a focal length of approximately 160 mm, the SV165 strikes a balance between sensitivity and field coverage, making it effective for guiding across a wide range of focal lengths.

Six-Point Alignment & Secure Focusing

The adjustable six-point ring system allows precise centring of the guide scope. A smooth helical focuser with scale markings makes it easy to achieve and repeat accurate focus.

Extension Tubes & Camera Compatibility

Supplied extension tubes allow flexible camera positioning to achieve correct focus with a wide range of guide cameras. The brass compression ring and nylon-tipped screws protect camera barrels while maintaining secure attachment.

Typical Use Cases

• Autoguiding for deep-sky astrophotography
• Lightweight refractor imaging setups
• Portable and travel-friendly mounts
• Can also be used visually as a basic finder scope

Key Specifications

• Aperture: 40 mm
• Focal ratio: f/4
• Approx. focal length: 160 mm
• Construction: Aluminium body
• Optics: Fully multi-coated

Package Contents

• SV165 guide scope optical tube
• Guide scope rings with six-point adjustment
• Mounting base
• Extension tube set
• Fixings and tools
• User manual
• Dust caps

Compatibility Notes

• Compatible with most small guide cameras
• Designed for astrophotography guiding
• Lightweight design suitable for modest mounts