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Vixen VSD 100/f3.8 Astrograph
VIixen  VSD 100/f3.8 Ultra Fast Astrograph
Vixen VSD 100 f/3.8 Astrograph Optical Tube

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List Price: $8,260.00
Our Price: $5,999.00
Savings: $2,261.00

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Product Code: 26145

Description Technical Specs

Vixen's Astrograph is getting great reviews. "Sensational" according to Tony Hallas! The innovative wide and flat imaging field, that covers 645 medium format cameras, and 5 elements in 5 group lens design completely eliminates a violet tint in chromatic aberration (blue halo). With an SD lens in the front objective group and an ED lens in the rear objective group, this scope achieves superb color correction. The blue halos around stars, that are visible in astrophotography and are hard to reduce with a 4 elements in 4 group lens design, are corrected successfully with this 5 element design. In addition, astigmatism and coma aberrations are corrected to an extremely high level of image quality. The VSD 100 comes with an aluminum storage case.

The Strehl intensity on the lens design of the VSD-100 F3.8 is better than that on a 4 elements in 4 group lens design by approximately 10%. It does not decrease abruptly on stars away from the center of a photographic field. It is ideally suited to detect faint stars. The image circle is as large as 70mm in diameter (60% illuminated). The star images are as small as @ 15 microns around the corners, resulting in excellent field flatness.

The lenses of the VSD100 F3.8 have the most up-to-date coatings of extremely low reflectivity. These have been developed to match the characteristics of each lens element in order to avoid the deterioration of image contrast due to the increase of lens elements. The Vixen VSD Telescope boasts of a 99.9% light transmission at the maximum per lens surface and achieves superb images with extremely high contrast and no ghost and no flare images. (Patent pending)

Objective Lens: SD Apochromatic
Lens Elements: 5 Elements in 5 Groups (one SD lens and one ED lens)
Effective Aperture: 100mm
Focal Length:380mm
Aperture Ratio: 1:3.8

Tony Hallas Says:"To have this level of performance from an f/3.8 is remarkable. All in all..a very impressive little telescope! The telescope is essentially sensational. It accomplishes the impossible. Mechanically superb as well, supporting the heavy 16803 camera without any complaint and the enormous helical focuser is tight and accurate. With extremely fast optics, flat field, and superb color correction it is a unique product not just a rehash of the same. " His amazing image of M42 is seen here.
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