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Vixen  |  SKU: ES26131

Vixen VSD90SS 90mm f/5.5 Apochromatic Refractor Telescope


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Vixen VSD90SS 90mm f/5.5 Apochromatic Refractor Telescope


  • 90mm / 3.54" Apochromatic Refractor
  • 495mm Focal Length
  • f/5.5 Focal Ratio
  • Anti-Reflection Coating
  • 5-Group 5-Element Fast-Ratio Astrograph
  • Compatible with ZWO EAF (focuser)

Ultimate 5-Group 5-Element Fast-Ratio Astrograph: The Pinnacle of Astrophotography and Visual Astronomy

Experience the zenith of astronomical observation with the Vixen VSD90SS 90mm f/5.5 Apochromatic Refractor Telescope, the Ultimate 5-Group 5-Element Fast-Ratio Astrograph. Designed for the discerning astrophotographer and avid visual astronomer alike, this model sets a new standard in dual-purpose telescopes, combining stellar performance with unmatched ease of use.

  • Advanced Optical Design: Featuring an unparalleled optical configuration that includes two premium-grade SD lenses and one high-refractive index ED lens for the convex elements, alongside top-tier lanthanum glass for the concave elements. This design significantly surpasses the conventional VSD100F3.8 in aberration correction, delivering exceptionally sharp, vibrant, and uniformly illuminated star images across the expansive 44 x 33mm large format, as well as standard 35mm full-frame sensors.
  • Superior Aberration Correction: The innovative 5-group, 5-element design, highlighted by the dual SD lenses, achieves an extraordinary level of aberration correction. This results in pristine color accuracy and minimal distortion across the entire field of view, setting a new benchmark in astrophotographic imaging quality.
  • Enhanced Light Intensity & Reduced Vignetting: By adopting a rack and pinion focuser and expanding the diameter of the rear lens group, the VSD90SS significantly improves peripheral light intensity and reduces vignetting. This advancement ensures rich gradations and facilitates easier peripheral illumination correction during post-processing, offering an optimal imaging experience free from optical system-induced vignetting and non-axisymmetric flares.
  • Exceptional Visual Observation Performance: From low to high magnification, the VSD90SS excels in delivering a flat image surface and sharp, comprehensive field of view images when paired with high-quality eyepieces. Its multi-wavelength Strehl ratio of 96.7% at the center surpasses that of renowned high-performance apochromats, making it ideal for detailed observations of planets and deep-sky objects.
  • Compatibility and Convenience: The VSD90SS is compatible with the ZWO EAF for automated focusing, enhancing usability and precision in astrophotography setups. It supports dual-speed focusing, allowing for fine adjustments to achieve the perfect focus.

Optimize Your Observational Experience: Whether capturing the subtle nuances of distant galaxies or observing the intricate details of planetary surfaces, the Vixen VSD90SS 90mm f/5.5 Apochromatic Refractor Telescope invites you to redefine your astronomical pursuits with its cutting-edge design and superior performance.

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Vixen VSDF90SS 90mm f/5.5 Apochromatic Refractor Telescope | ES26131 | 4955295261314

Vixen VSD90SS 90mm f/5.5 Apochromatic Refractor Telescope





90 mm | 3.54"

Focal Length

495 mm

Focal Ratio


Field of View



1.29 arc seconds resolution

11.5 limiting magnitude

Fully multi-coated optics

Barrel Size



115mm dia. X 600mm long (476mm long for storage)


9.5 lb | 4.3 kg
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