The SVBONY SV198 50 mm Mini Guide Scope is a compact yet capable guiding solution designed for accurate star tracking in astrophotography. With a larger aperture and fine focusing mechanism, it delivers bright guide stars and precise focus control for long-exposure imaging.

Key Features

• Compact & Portable Design
  Lightweight construction makes the SV198 ideal for mobile and travel-friendly astrophotography setups.
• 50 mm Aperture for Brighter Guide Stars
  The larger aperture improves light-gathering ability, contrast, and resolution, enhancing guiding accuracy under darker skies.
• Precision Fine-Focus Mechanism
  Built-in fine focusing allows accurate and repeatable focus, critical for reliable autoguiding performance.
• Fully Multi-Coated Optics
  Internal coatings reduce reflections and stray light, improving image contrast and reducing optical noise.
• Robust Aluminium Construction
  Durable metal housing maintains optical alignment while remaining lightweight for modest mounts.

Designed for Astrophotography Guiding

The SV198 is optimised for use with small guide cameras, providing stable, well-defined guide stars for accurate tracking during long exposures.

Fine Focusing & Optical Control

The fine focusing system enables precise adjustment, improving star sharpness and reducing guiding errors. This is especially valuable when working with sensitive guide cameras and narrow depth of focus.

Camera & Eyepiece Compatibility

A 1.25-inch eyepiece holder with T2 (M42) threading provides broad compatibility with guide cameras and accessories. With the supplied 45 mm extension tube, the SV198 works with many popular guide cameras, including SVBONY SV905C, SV305, and similar models.

Without the extension tube fitted, the guide scope can also be used with standard 1.25-inch eyepieces for basic visual observing or finder-style use.

Internal Blackening & Contrast Control

Internal blackening and optical baffling reduce reflective interference and stray light, improving contrast and overall guiding reliability.

Typical Use Cases

• Autoguiding for deep-sky astrophotography
• Medium-to-long focal length imaging setups
• Portable imaging rigs needing brighter guide stars
• Optional visual use with 1.25-inch eyepieces

Key Specifications

• Aperture: 50 mm
• Optical type: Guide scope
• Focusing: Fine focus mechanism
• Eyepiece holder: 1.25″ with T2 (M42) thread
• Construction: Aluminium body

Compatibility Notes

• Compatible with many small guide cameras
• Extension tube included for increased focus range
• Designed primarily for guiding, not as a main imaging telescope