Vixen VSDF90SS 90mm Refractor Telescope

Vixen Optics VSDF90SS 90mm ED APO f/5.5 Refractor Telescope w/ Tube Ring

The Vixen VSDF90SS Telescope with Tube Ring stands out as an exceptional astrograph catering to both visual and astrophotography enthusiasts.

This flagship model prioritizes maximum performance and user-friendliness, incorporating an optical design that utilizes two top-grade SD lenses and one high-refractive index ED lens for superior aberration correction.

This results in extraordinarily sharp, beautiful, and uniform star images across the entire field, including the edges of the large-format 44 x 33mm and 35mm full-size frames.

The 5-group and 5-element design, featuring two SD lenses, achieves an impressively high level of aberration correction.

Notably, the use of two nearly identical SD lenses effectively minimizes color distortion and image distortion due to focus and squaring shifts, surpassing the performance of the VSD100F3.8. From capturing images to post-processing, the VSD90SS promises consistently easy and stable shooting results.

The helicoid focuser has been replaced with a rack and pinion focuser, allowing for an increase in the diameter of the rear lens group.

This design modification significantly improves peripheral light intensity and reduces vignetting, providing ample gradation in the peripheral field of view.

The prevention of non-axisymmetric flares further enhances image quality. While vignetting may occur depending on the shooting system, the VSD90SS offers substantial improvements over its predecessor, the VSD100F3.8.

In terms of visual observation, the VSD90SS excels across a range of magnifications, delivering a flat image surface and sharp views when combined with high-quality eyepieces.

The multi-wavelength Strehl intensity of 96.7% at the center of the field of view rivals the performance of the esteemed SD81SII apochromat.

This versatility makes the telescope suitable for low-magnification, wide-field observations, as well as high-magnification studies of planets and other celestial objects.

Additionally, the VSD90SS is compatible with the ZWO EAF (Electronic Automatic Focuser), providing convenient and precise focusing capabilities.

Users can also opt for a dual-speed focuser, but it's important to note that the ZWO EAF and dual-speed focuser cannot be used simultaneously.

Overall, the Vixen VSDF90SS Telescope combines advanced optics with practical features, making it a standout choice for enthusiasts seeking top-tier performance in both visual and astrophotographic pursuits.

Features:

• 90mm Objective Lens: The Vixen VSDF90SS Telescope boasts a substantial 90mm objective lens, providing a generous aperture for capturing detailed and vibrant views of celestial objects. This feature ensures impressive light-gathering capabilities, enabling observers to explore the night sky with clarity and precision.

• 175x Highest Useful Magnification: With a highest useful magnification of 175x, this telescope allows for detailed and close-up observations of celestial phenomena. Whether you're exploring the intricate features of planets, lunar landscapes, or delving into the depths of deep-sky objects, the VSDF90SS offers a powerful magnification range for a captivating viewing experience.

• 495mm Focal Length: The telescope features a focal length of 495mm, striking a balance between magnification and field of view. This design provides versatility, making it well-suited for both astrophotography and visual observation. The focal length ensures a harmonious combination of detailed planetary views and immersive deep-sky exploration.

• An ultimate 5-group 5-element fast-ratio astrograph for both photo and visual astronomers: As the ultimate 5-group 5-element fast-ratio astrograph, the VSDF90SS caters to the needs of both astrophotographers and visual astronomers. This comprehensive design emphasizes maximum performance, delivering exceptional image quality for astrophotography while maintaining excellence in visual observations.

• 5-group and 5-element design (two SD lenses) realizes extremely high-level correction for aberration: The optical design of the telescope includes a sophisticated 5-group and 5-element configuration, featuring two Super Low Dispersion (SD) lenses. This design achieves an extraordinarily high level of aberration correction, ensuring that images are crisp, clear, and virtually free from distortions. This is a significant advancement, particularly in comparison to conventional optical designs.

• Significant improvement in peripheral light intensity: The VSDF90SS incorporates a design improvement for enhanced peripheral light intensity. This innovation results in reduced vignetting and improved illumination across the entire field of view. The telescope minimizes non-axisymmetric flares caused by light diffraction, contributing to a superior viewing experience with vibrant and well-illuminated celestial images.

• Exhibiting high performance even in visual observation from low to high magnification: This telescope demonstrates exceptional performance across a broad range of magnifications, making it suitable for various visual observation scenarios. From low-magnification, wide-field views to high-magnification examinations of planets and other celestial objects, the VSDF90SS consistently delivers sharp and detailed images throughout its magnification range.

• Compatible with ZWO EAF (focuser): The VSDF90SS is designed for convenient and precise focusing, supporting compatibility with the ZWO Electronic Automatic Focuser (EAF). This feature enhances the overall user experience, allowing for effortless and accurate adjustments to achieve optimal focus during astrophotography sessions.

What's Included:

✓ Vixen VSDF90SS 90mm Refractor Telescope with Tube Ring 

✓ Vixen Electronic Parts: Limited One Year Warranty

✓ Vixen Mechanical Parts: Limited Two Year Warranty

Specifications: