The SVBONY 0.5× Focal Reducer is a compact 1.25-inch accessory designed to widen the field of view for eyepiece-based astrophotography and visual observing. By reducing the effective focal length, it allows larger celestial objects to fit more comfortably within the frame and improves usability with entry-level imaging setups.
Key Features
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0.5× Focal Reduction
Reduces the effective focal length by approximately 50%, delivering a significantly wider field of view for both observing and basic astrophotography. -
Wider Framing for Large Objects
Particularly useful for extended deep-sky targets such as nebulae, open clusters, and the Moon. -
Anti-Reflection Coated Optics
Fully coated air-to-glass surfaces improve contrast and reduce internal reflections, helping maintain image clarity. -
Suitable for Visual & Eyepiece Projection Imaging
Can be used visually to increase true field of view, or with eyepiece-projection and entry-level CCD/CMOS imaging setups. -
All-Metal Construction
Durable metal housing with precise 28.5×0.6 threading on both ends for secure attachment.
Use Case & Performance Notes
This 0.5× reducer is best suited to small sensors, planetary cameras, and eyepiece-based imaging. The actual reduction factor may vary depending on spacing and optical configuration.
- Ideal for Moon and large deep-sky objects
- Useful for improving framing with short eyepiece projection setups
- Not designed for full-frame or large-sensor deep-sky imaging
Compatibility Notes
- 1.25-inch eyepiece and accessory systems
- Thread specification: 28.5×0.6 (standard 1.25-inch filter thread)
- Best results achieved with modest sensor sizes and careful spacing
