Vixen Telescope SD Reducer HD Kit

Capture Sharpness Edge-to-Edge with Vixen Precision

Dreaming of perfect celestial images? The Vixen SD Reducer HD Kit delivers exceptional edge-to-edge clarity, eliminating distortions and blurry edges. Whether you're capturing wide celestial vistas or detailed planetary features, this kit transforms your telescope into a professional-grade imaging system.

Features

• Enhanced Flat-Field Performance: Achieve distortion-free imaging with sharp details across the entire field of view, ideal for full-format DSLR cameras with a 44mm image circle.
• 0.79x Focal Length Reduction: Reduce focal length (e.g., f/7.7 → f/6.1) for brighter, faster exposures without sacrificing image quality or sharpness.
• Advanced Coating Technology: Featuring Vixen’s AS anti-reflective coating—used in the high-end VSD100 f/3.8 Astrograph—this kit ensures 99.9% light transmission per lens surface, minimizing ghosting, flare, and light loss.
• Versatile Telescope Compatibility: Designed for SD-series optical tubes (SD81S, SD103S, SD115S) and seamlessly integrates with AX103S and VC200L telescopes.
• Illumination Versatility: The VC200L achieves a 36mm image circle with 60% peripheral illumination and supports a 44mm image circle with 47% illumination, ensuring sharp results even at larger fields of view.
• Precision Engineering: Compact and lightweight components include the SD Flattener HD (58×34mm, 111g), Reducer HD (68×45.2mm, 218g), Spacer Ring SD81 (57.5×22.5mm, 18g), and EX Tube 66 (68×76mm, 89g).
• DSLR Camera Ready: Fully optimized for full-format (36x24mm) and APS-C (23x16mm) sensors, delivering exceptional sharpness and minimal vignetting across all image formats.
• Filter-Compatible Design: Supports 52mm filters, ideal for light pollution reduction, narrowband imaging, or enhancing star contrast.

The Vixen SD Reducer HD Kit is for you if…

• You demand precision imaging: Perfect for astrophotographers seeking edge-to-edge clarity and sharpness, even with full-frame DSLR cameras.
• You need adaptable tools: Modular design allows for independent use of the SD Flattener HD or Reducer HD, tailored to your imaging needs.
• You own compatible telescopes: Seamlessly integrates with SD-series optical tubes and other Vixen systems like AX103S and VC200L.
• You value premium optics: Trusted Vixen coatings and precision engineering ensure exceptional light transmission and durability.
• You want professional results with ease: Simplify your setup while achieving stunning astrophotographic results with minimal effort.

Why the Vixen SD Reducer HD Kit Stands Out

Unmatched Optical Performance

The lenses feature Vixen’s advanced AS anti-reflective coating, ensuring over 99.9% light transmission per surface. This minimizes light loss, eliminates ghosting, and enhances contrast, even in challenging lighting conditions. Whether you're imaging faint nebulas or intricate star clusters, your photos will be vivid, clear, and distortion-free.

Adaptable Imaging Configurations

The SD Flattener HD maintains your telescope’s original focal length for superb flat-field imaging, while the Reducer HD shortens focal length by 0.79x for brighter exposures and faster imaging. Together, they deliver unmatched versatility for any astrophotographic challenge.

Seamless DSLR Compatibility

Full-format DSLR users will appreciate complete field coverage (44mm image circle), while APS-C users benefit from superior sharpness and minimal vignetting. This flexibility ensures optimal results regardless of your camera’s sensor size.

Premium Build Quality

Designed for field and observatory use, the SD Flattener HD and Reducer HD are lightweight yet durable. Precision-engineered spacer rings and tubes ensure easy alignment, saving you time and frustration during setup.

Filter-Compatible for Creative Control

With a 52mm filter thread, the kit supports popular astrophotography filters for reducing light pollution, enhancing contrast, or capturing specific wavelengths during narrowband imaging.

Example Image with SD103S + SD Flattener HD: M3 Globular Cluster

Example Image with SD103S + SD Flattener HD: M31 Andromeda Galaxy

System Structure Diagram